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Author Biography: Laurence Bergreen is the author of several award-winning biographies, including the lives of Louis Armstrong, Al Capone, and Irving Berlin.
One Mars on Earth
Date: Thu, 16 Jul 1998 00:48
From: Laurence Bergreen <bergreen@NYCnet.net>
To: Jim Garvin <email@example.com>
Hi Jim, It's late Wednesday night, and I am back home from Houston. With time growing short, what can you tell me about Iceland? Last I heard, there was a strong chance of postponement till October. Looking forward to hearing from you as soon as possible. Thanks. Larry
Subject: Re: ICELAND
Date: Thu, 16 Jul 1998 09:25:53
From: Jim Garvin <firstname.lastname@example.org>
To: Laurence Bergreen <bergreen@NYCnet.net>
Larry, We're GO for Iceland. As of now, we are booked to arrive in Iceland early on the 20th, and quickly pick up a helicopter ride to Surtsey for a 6-hour working visit. I am trying to be sure we can catch the Iceland Coast Guard helicopter, given that we land between 6 and 6:30 AM and must get thru customs and get the rental Jeep. Get set for Mars on Earth. Jim
It's 6:15 in the morning when Jim Garvin, a planetary geologist who works for the National Aeronautics and Space Administration, meets me at Iceland's Keflavik Airport. As arranged, he's flown in from Baltimore, and I've come from New York. Jim is forty-one, talks in torrents, and is plainly Type A, endowed with the passion and restlessness of an old-fashioned genius. Although he has two small children, he puts in eighty-hour work weeks. He is intense. There is no such thing as a short conversation with Garvin. His replies to simple questions have a way ofdigressing into hour-long ruminations on the nature and origins of the universe, but he gets away with it mostly because he is unfailingly polite. Once he launches into a monologue, he gestures emphatically, as if visualizing and touching everything he describes. He is fit and compact, with black hair, handsome Irish features, and a perpetually worried voice. He looks clean-cut, at least compared to other scientists, and his skin is slightly irritated in patches, as though he's been vigorously applying aftershave lotion. A friend once told me it is often hard to get Jim Garvin's attention, but once you do, it can be overwhelming. Now I have his attention.
After we retrieve our bags, Jim sets out to find Oscar, the pilot of the plane we've hired to take us from Keflavik to the island of Heimaey, off the southern coast of Iceland, where we are to rendezvous with the Iceland Coast Guard, weather permitting. Oscar, when we catch up with him, looks too young to drive a car, let alone pilot a plane. We cram ourselves into his single-engine Aerospatiale, a lightweight aircraft of French design. The co-pilot's seat I occupy is so cramped that my knees interfere with the controls. We are battling fatigue, Jim and I. We have been up all night, and the inside of my mouth tastes like kerosene from the Aerospatiale's tank.
We have come all this way because geologists studying Mars have designated Iceland a Mars analogue. In 1976, when the Viking Lander returned color images of the Red Planet, scientists realized that Mars bears a striking resemblance to the landscape sliding below Oscar's little airplane. Iceland is, in many places, an arctic desert devoid of vegetation and untouched by humanity. These days, NASA-supported scientists regularly visit to study this volcano-ridden island to compare it to its distant relative, Mars. The theory is that by studying Iceland, scientists can better understand the workings of the Red Planet. Iceland is only twenty million years old, a geological babe, and thus relatively unweathered, a primeval landscape. The absence of trees on the Icelandic landscape is a blessing, revealing the island's geological makeup. Mars is similarly bare. Iceland festers with active and dormant volcanoes-just as Mars does. The resemblance makes it possible to work out significant aspects of the geologic history of both places by comparing the two.
Mars is so reminiscent of Earth that it is considered "semi-habitable." The atmosphere is only one percent as dense as ours, but breathable air could be extracted from it. The Martian day, or "sol," lasts about as long as a day on Earth; a Martian year consists of 687 Earth days. Like Earth, Mars has its seasons, but they last twice as long. And Martian weather is anything but monotonous or predictable. In 1997, when Pathfinder landed on Mars, its tiny weather station gathered data on the local Martian weather, which NASA posted on the Internet. The reports showed that temperatures range from 60° F at noon to -100° F at night. Travelers' advisory: because of the much lower atmospheric pressure on Mars, surface temperatures differ drastically from air temperatures. If you were standing on the surface in midday, your feet would be warm and snug, but the fluids in your head would freeze. Mars' atmosphere has fog, wind, and red dust, lending pink tints to a sky accented by two small, misshapen moons, Phobos ("fear") and Deimos ("terror").
Mars resembles Earth in other ways. Its polar ice caps wax and wane seasonally. There are clouds. There is ample geologic evidence that rivers once flowed freely on its surface. The stage has long been set for life to appear there. Yet the Earth teems with life, while Mars appears barren, at least on the surface. Why? No one really knows, yet the answers may lurk in the perplexing differences between the two planets.
The Earth's surface consists of overlapping, often ill-fitting plates covering its molten interior. They form a crust similar to an eggshell, thin and brittle. They bump and grind against each other; occasionally they pull apart, as they are doing now in Iceland, giving rise to earthquakes and volcanoes and mountain ridges lurking beneath the oceans. Iceland sits right on the spine of the Mid-Atlantic Ridge, a segment of the Mid-Ocean Ridge, which is the longest mountain range on Earth, extending 40,000 miles, or one-and-a-half times around the planet. Iceland's unique placement means that half of it belongs, in a geological sense, to the European continent, and half to the American. And the two halves are pulling apart at the rate of one centimeter a year. That doesn't sound like a lot, but when this movement occurs over the course of ten or twelve million years, it eventually becomes a very big deal. Iceland could break apart and be absorbed by other, larger land masses. Or if it surges in volcanic activity, it could enlarge itself, adding enough real estate to accommodate many more hardy souls. For now, a seam runs right through Iceland, clearly marked in some places by a narrow chasm and in others by small streams and little cracks. If you jump across one of the cracks, you jump from one continent to another.
At this moment, no one knows for certain if Mars has or had plates similar to Earth's or, if the Red Planet did have them, how they operated. If Mars never had crustal plates, their absence poses interesting questions about how it developed without them. And if it did, we see no direct evidence of them-not yet, at any rate. The geologic processes associated with crustal plates would have affected the way life did, or did not, develop on Mars.
"Nothing you see here is more than ten thousand years old," Jim shouts over the whine of the engine, as we pass over the Reykjanes Peninsula region of southwest Iceland, "and some of it is only five thousand years old, or less." Jim lives by the geological clock, which extends billions of years, all the way back to the formation of the universe. The universe is an old, old place, perhaps 15 billion years old, possibly more, and the planets of our solar system are old, too, something on the order of 4.7 billion years. When you measure time in billions of years, you dismiss a million years as a hiccup. A span of five or ten thousand years is insignificant. The concept of a year, the time it takes for the Earth to complete a revolution around the Sun, scarcely seems an adequate yardstick for measuring the development of the universe and the planets. Iceland's arriviste status in the geological scheme of things is rare and intriguing; the place teems with clues about the formation of Earth, of Mars, and of the entire solar system. To understand the Red Planet, even partially, is to understand something about the nature of the universe, to catch glimpses of our distant past and our future, to extend perception to a scale much larger than ordinary human comprehension, to harness the imagination to the intellect, and the intellect to the stars.
These days, planetary scientists like Jim regard the geology of Mars as crucial for understanding Earth and the other rocky planets in the solar system-Venus and Mercury (and the moon as well). Jim reminded me that the geologic prizes on Mars are rich. Although it is forty percent smaller than Earth, Mars has peaks and valleys that are far more extreme. The continental United States could fit nicely into one of its canyons. Its volcanoes are awesome. The largest, Olympus Mons, is almost 90,000 feet high. It would tower over Mt. Everest, and it's large enough to occupy the state of Arizona. It is one hundred times larger than the biggest volcano on Earth; in fact, Olympus Mons is the largest mountain in the entire solar system. Mars is a planet of geological superlatives.
Oscar levels off the Aerospatiale at 2,000 feet. Beneath us, the primeval landscape-gray and brown and black, rocky and dusty and nearly treeless-extends toward the horizon. Is this what it would be like to fly over the scarred surface of Mars? Eventually, we cross a beach, and the island of Heimaey, our stopover point, lies ahead, gradually gathering substance in the blue mist. It is a remarkably tranquil day, so calm that a limp windsock on the ground barely swivels as we veer toward the island's tiny runway, a strip of asphalt running uphill between two volcanic peaks. Ever since leaving New York, I've been placing my life in the hands of complete strangers, and now, sitting beside Oscar as he casually maneuvers his small aircraft, I wonder if I've finally gone too far.
"Move your legs! Please!"
Oscar orders me to contract so he can freely guide us to a safe landing. The plane taxis to a standstill. We are almost there.
Jim hasn't managed to coax NASA into funding this leg of the journey-which comes to about $300. As we slap down our plastic to pay the bill, Jim cites NASA's "faster-better-cheaper" way of doing business to explain why we must pay the airfare to conduct scientific research. Dan Goldin, NASA's mercurial administrator, instituted the policy after he took over the agency in 1992. NASA, like any federal bureaucracy, has indulged in its share of waste and redundancy, and Goldin, coming out of private industry, wanted to trim the bureaucratic flab and refocus NASA. Essentially, he wanted to do more with less. He increased the number of planetary missions under the "faster-cheaper-better" regimen; instead of one expensive mission, the agency would send two, or even four, cheap ones, and the returns would be correspondingly greater. And they were! But planetary exploration at any price is an exceedingly risky business, and more missions has also meant more failures. In the grip of "faster-better-cheaper," NASA didn't realize that the American public would fasten onto the failures of its recent missions to the Red Planet-Mars Climate Orbiter and Mars Polar Lander-and forget the successful ones. The notion that NASA was exploring the planets on the cheap and occasionally bungled the job alarmed the media, and it alarmed Congress-how could this have happened?-yet it was Congress who, year by year, imposed the budget cuts on NASA that led the agency to adopt "faster-cheaper-better." The result is NASA Lite.
The cuts have been playing havoc with Jim's work life. For weeks, the Iceland expedition has been in doubt because of the fragile health of the reconnaissance plane, a modified P-3. This is a large four-engine turboprop originally meant to fly low over the ocean to detect submarines lurking below the surface. NASA adapted this aircraft for remote sensing: measuring geological, oceanographic, and atmospheric features with instruments used in conjunction with satellites. But NASA's P-3 is a thirty-year-old rust bucket, and it has seen hard use. Jim has reminisced about the crew's Technicolor yawns as the plane followed the rolling terrain at a low altitude, like an airborne roller coaster. He has described the spiderweb cracks that developed in the windshield during an Iceland mission in May 1996. The windshield threatened to crack wide open, jeopardizing the mission. One pilot gave an order to don emergency gear, but the other pilot disagreed, and besides, they had no emergency gear or crash helmets or parachutes. To make matters worse, they were carrying too much fuel to land, and the Icelandic government prohibits dumping fuel into the Atlantic. They had to fly for hours at slow speed, burning fuel, until they could land safely and legally. More recently, the plane developed a chronic fuel leak and lost an engine in flight over Greenland. The accumulated weight of these stories worried me. Even Jim, who does this kind of thing for a living, was anxious. I checked out the P-3 with my friend Peter, a commercial pilot who has flown all over the world in dicey equipment. Peter explained that, worst-case scenario, if an engine or two quit, the plane could coast more or less gently to the ground, unlike a helicopter, which would drop from the sky. I was not completely reassured.
NASA keeps the rust bucket aloft, despite everything, "to facilitate cost-effective essential remote sensing that has inexorably been rewriting textbooks associated with atmospheric science, climate change, and the lay of the land," as Jim puts it. In other words, this rust bucket is changing the way scientists think about how our planet works.
Despite the significance of its science missions and the public dismay when they go wrong, relentless budget cutting continues to afflict NASA. The agency now receives less than 14 billion dollars a year, less than one percent of the overall federal budget, and each year its budget shrinks a little more. The unkindest cuts of all affect people, not hardware. Administrator Dan Goldin earns about $150,000 a year, and scientists like Jim Garvin, who hold one or more advanced degrees and are often among the leading figures in their fields, earn less, something equivalent to a college professor's salary. Unlike academics, they work six or seven days a week, year-round, without sabbaticals. And NASA has stringent rules governing outside income from consulting or lecturing, so moonlighting is out of the question, even if the NASA scientists had time for such activities, which they don't. Willingly or not, Jim and his colleagues must emulate the example of Louis Agassiz, the famous naturalist, who stated, "I cannot afford to waste my time making money."
Why do they do it? Why do these driven scientists, who could be earning several times more than their current salaries in private industry, stick with stingy old NASA? Why do they remain oblivious to imploring spouses and former colleagues who have gone to seek their fortunes in private industry? The most these NASA scientists can reasonably hope for is recognition from their peers, if they make a major discovery. They'll have an easier time getting grants, lots of impressive plaques to hang on the wall, and that's about it. Despite the influence of their ideas on the course of science and exploration, obscurity is often their lot. Who can name the members of the team that in 1996 announced possible evidence of fossilized life in a Mar-tian meteorite-a discovery that, if correct, will stand as one of the most significant breakthroughs of all time? Who can name any NASA-supported scientist, for that matter, with the possible exception of Carl Sagan? And who, outside of the scientific community, is aware of Sagan's actual role in NASA's exploration of space?
Sagan's success as a popularizer of the cosmos obscures his real achievements as a scientist, thinker, and writer. A productive scientist and winner of the Pulitzer Prize, he frequently appeared on The Tonight Show; he didn't fit into neat categories. He was cursed with charisma. An astronomer by training, he gave a convincing impression of being at home with a number of disciplines ranging from mathematics to history. His fascination with space offered reassurance rather than terror of the unknown. He developed a benign, Jeffersonian vision of the universe as the last frontier, the ultimate, infinite West, where humanity would be able to seek refuge after fouling this planet and possibly destroying itself in the process. Sagan's outer space, like Thomas Jefferson's West, offered sufficient scope to alleviate humanity's ills. He was pessimistic about the future of mankind if we were confined to Earth for too long. It seemed to him a near certainty that, sooner or later, we would blow ourselves up. The only escape from his Malthusian nihilism was the vastness of space and the promise of distant planets, where humankind could start anew. This vision of space as the new frontier influenced NASA from its inception, imparting a sense of purpose, and it inspired younger scientists by giving them a larger context for their research. In the midst of bureaucratic setbacks and budget battles, Sagan knew what was at stake in the exploration of space: over the short term, enlightenment; over the long term, the survival of humanity.
Throughout his career, he cultivated a special fascination with Mars. For him, it was a touchstone of all heavenly bodies and possibly the salvation of humanity. He wrote about it for scientists and for general readers, artfully mixing speculation and scientific fact. He prodded NASA to explore. And he held out hope for life on Mars. As early as 1966, when the conventional wisdom in the scientific community, chastened by the barren photographs resulting from the Mariner missions, held the chance of life on Mars to be zero, Sagan, almost alone among prominent scientists, speculated that such a phenomenon might still be possible.
Sagan influenced a generation of younger scientists, who have their hands on the levers of the future and who fervently believe that now is their time to change scientific thinking about the nature of the universe and our place in it. They stick with their work for many reasons: because they can't do without it; because NASA gives them the means to do what they've yearned for since they were children growing up in the heyday of the space race, watching John Glenn go into orbit; because NASA will let them send something of their own design-a part of them-into space; because NASA has the rockets and the launch facilities and the infrastructure to get it done; because NASA will validate their work in the eyes of the scientific community and the world. Because, when it comes to planetary exploration, NASA is the only game in town.
The little airport on Heimaey is deserted; the Iceland Coast Guard helicopter has yet to arrive. Oscar sits at a table in an empty café, smoking a cigarette. Jim, wired, munches on a Mars bar ("It's my planet, Larry. I may as well") and reminds me that twenty-five years ago, this quaint little island ("Heimaey" means "Home Island") had to be evacuated when that volcano-over there-erupted, and lava poured down its slopes into the village. When the eruption ended, Eldfell, as the volcano is known, had transformed the island. It was fifteen percent larger and contained thirty million additional tons of lava, which the local populace later used for roads and buildings. Nor was that eruption unusual for Iceland. Every five years, Iceland witnesses a major volcanic eruption, some capable of sending enough ash into the atmosphere to darken the hemisphere's skies and lower global temperatures. In 1783, the largest volcanic eruption observed in modern times occurred in Iceland. It lasted for months and disgorged more than two hundred square miles of lava. That explosion hurled sulfur dioxide particles into the lower atmosphere; they in turn caused acid rain that polluted the ground, poisoned cattle, starved a quarter of Iceland's population, and darkened the skies over Europe. (A natural catastrophe of that magnitude has likely occurred on Mars.) Iceland is overdue for another eruption, Jim remarks casually, and an active volcano dominates the island where we will spend the day. The island's name is Surtsey.
The newest place on Earth, Surtsey is even more Mars-like than the rest of Iceland. It was formed in a mammoth undersea volcanic eruption that lasted from 1963 until 1967 and, during its early phases, lit up the night skies for miles around. It was named for Surtur, the fire-bearing giant of Norse mythology. The island is younger than Jim, who was seven years old when it erupted into being. At the time, his family was living in Beirut, where his father worked for IBM. Jim's maternal grandmother, who was living with them, became fascinated by the eruption. She collected all the newspaper clippings about it she could find and showed them to her grandson, giving an unexpected direction to his life. Jim has remained in Surtsey's thrall ever since. The vanity plates on his ten-year-old Jeep announce, "SURTSEY."
Only a couple of hundred people have ever set foot on the island. Access is extremely difficult. The North Atlantic currents surrounding it are too rough for most boats to negotiate; swells around the island are frequently twenty feet; waves have been said to reach eighty feet. The island is off-limits to everyone but a few heavily credentialed scientists who have obtained permission from the Icelandic government to conduct research there on a "non-biologically interfering basis." In practice, this restriction has made Surtsey into one of the largest and most carefully studied natural laboratories on the face of the Earth, of interest to geologists because of its recent, well-documented formation; to botanists and biologists, who track the development of life; and to Marsists like Jim Garvin who regard a visit to Surtsey as the closest they'll ever come to the Red Planet.
The only practical way to reach the island is by helicopter, weather permitting. "There are no guarantees, as helicopters only go out that far once a month," Jim alerted me several weeks earlier, when we were starting to get serious about the field trip. "Please note there are NO insurance provisions. ANYONE going to Surtsey does so at his or her own risk, and there is some, as the island is still HOT and there are hydrothermal systems with 120-degree centigrade water just beneath the ground. Also, the weather can change, and people have been stranded. I was urged to remind you of this. Also, what I must do out there will require vigorous hiking over lava and volcanic ash. Anyway, there is a chance we will get there for a day that I do believe you will thoroughly enjoy."
Jim once mentioned to me that his colleagues considered him a bit eccentric. After pondering his disclaimers and warnings concerning Surtsey, I recalled a strange story I'd heard about him. In the heyday of the Apollo program, NASA was thinking seriously about sending people to Mars, yet the agency hesitated. Guiding a robotic spacecraft to the Red Planet is an intricate, ambitious, and unpredictable undertaking; a human mission would be far more risky and complex. NASA was stymied by the problem of getting its astronauts home. Jim came up with a unique solution: he offered to go to Mars on a one-way basis.
When I asked Jim about this story, he was mildly abashed. "I'm not proud of this now, but when I was younger, before I married and had kids, I volunteered to go."
"Well, yes. The only way you could get a man there was one way. It would be too costly to get him back to Earth. So I would go there, have enough life support to explore and survive for two years, and then . . ."
"That would be all. And it would have been worth it, the scientific returns would have been spectacular, but that was before I had kids. Now I have other responsibilities I didn't have then."
The thin tin walls of the Heimaey airport terminal start to vibrate. There's a sound almost below the threshold of hearing. We feel it in our guts as it gets louder and more intense. Thwacka-thwacka-thwacka . . . Rotors whirring, the Iceland Coast Guard helicopter, an impressively large and sturdy Bell Jet Ranger, descends into view. It is a noisy piece of equipment, manned by a crew outfitted with brilliant orange flight suits. These are the men of the Iceland Coast Guard, and they swarm around us like giant luminescent insects. A small group of Icelandic botanists has joined us, and our little group approaches the helicopter, deafened by the whine of the motor and the thumping of the rotor. A crew member, smiling crazily, hands each of us a life vest and a helmet equipped with a microphone. I place the helmet snugly over my head, and the unbearable thwacka-thwacka-thwacka subsides to a distant drumbeat. We strap ourselves into the seats, and the helicopter slowly rises from the tarmac to a height of about six feet. We delicately revolve until the nose suddenly pitches forward, and we take off like a shot. This is flying. We swoop over the ocean at an altitude of about 500 feet, until we reach the island of Surtsey, fifty miles from nowhere. From the air, the place looks so barren and primitive and devoid of anything recognizable that even Heimaey, by comparison, seems civilized. The jagged gray lava formations of Surtsey rise to greet us. The helicopter sets down lightly on a concrete landing pad considerably smaller than my living room.
Less than twelve hours before, I was sitting in the back of a taxicab in New York City, and Jim was fighting traffic on the way to Baltimore-Washington International Airport. It is now 10:30 A.M. local time on a rare, beautiful morning on sub-arctic Surtsey. Our coordinates are 63° 13´ North, 20° 31´ West.
The rotors slow almost to a stop. We emerge from the helicopter and wave merrily to the crew. The helicopter begins to whine, the rotors fling gritty volcanic ash into the air, and the machine lifts off. It tilts toward the mainland and disappears, leaving a therapeutic silence.
We are alone on the newest place on Earth.
B&N.com's Science & Nature editor, Laura Wood, invited author Laurence Bergreen and three NASA scientists to discuss Voyage to Mars: NASA's Search for Life Beyond Earth. Although the popular image of NASA is dominated by astronauts and engineers, scientists like geologists and biologists are becoming increasingly important to planetary exploration with the blossoming of the new field of astrobiology. Voyage to Mars is an intimate portrait of NASA's scientific community.
James Garvin is NASA's Mars Exploration Program scientist at NASA headquarters in Washington, DC, a science team member on the Mars Global Surveyor mission (MOLA science team), and formerly a member of the Mars Observer science team. He spent 15 years as an earth and planetary scientist at NASA's Goddard Space Flight Center before taking on his current position at NASA headquarters as part of the new Mars Exploration Program. He received his Ph.D. in earth and planetary sciences from Brown University in 1984, studying under Professors Tim Mutch, Jim Head, and Richard A. F. Grieve. Garvin served as principal investigator on the first spaceflight of an advanced laser altimeter instrument: The Shuttle Laser Altimeter (SLA) made its maiden spaceflight in Earth's orbit in January 1996 aboard the space shuttle Endeavour and demonstrated what such instruments would eventually achieve in mapping Mars (i.e., MOLA). Garvin is fascinated by the "anatomy" of impact craters on Mars and has always displayed a healthy curiosity for fungi. He frequently shares his passion for Mars with his two small children, Zachary and Danica, as well as with his wife, Cindy. He is presently owned by a large Bouvier des Flandres dog named Georgie-girl.
Bridget Landry was one of two uplink system engineers for Pathfinder.
Robert Afzal was the lead laser scientist for the laser altimeter on the Mars Global Surveyor.
Barnes & Noble.com: Larry, previously you had written biographies. How did you come to write about NASA?
Laurence Bergreen: About three years ago, I met two very dedicated NASA scientists, James Garvin and Claire Parkinson, who were working at the agency's huge Goddard Space Flight Center in Greenbelt, Maryland. At the time, NASA was riding high after the successful landing of Pathfinder and its tiny rover, Sojourner Truth, on Mars as well as the announcement of possible evidence of signs of biological activity in a meteorite from the Red Planet. Thanks to Jim, Claire, and others, I was given extraordinary, behind-the-scenes access to the space agency's Mars program. I spent two years with its scientists as they mapped the surface of the planet in great detail and searched for signs of water -- therefore the possibility of life. I attended closed-door meetings and had numerous probing conversations with most anyone I wanted to talk with at NASA, including its charismatic, enigmatic leader, Dan Goldin. During this period, I witnessed NASA's planetary triumphs and its failures, including the loss of two Mars-bound spacecraft, and at the same time, gained considerable admiration for NASA science and scientists.
B&N.com: Jim, you were especially forthcoming for this book. Do you think it is important for scientists in general and especially for scientists involved in space exploration to try to impart some of their passion to the public? I was taken with the story of you weeping in front of your wife while describing the theory of panspermia -- the possibility that planets could be seeded with life transported through space. Can you describe what motivates you?
James Garvin: Indeed! I believe it is our place as scientists who are graciously funded by the American taxpayers to be forthcoming and to explain what motivates us to do what we do, in part for them. We are part of that great "unfinished journey" that some believe to be intrinsic to America. Larry is a unique individual who appreciates the human side of "doing science." Unlike many of my colleagues, I am passionate about the science that I do, to the extreme, and I may tend to display emotion to a greater extent than some. While this may be a weakness, it comes naturally to me. The thrill of what we called "first light" when our Mars Orbiter Laser Altimeter (MOLA) first measured the landscapes of Mars way back in September 1997 brought out the real emotions of many of our scientific/engineering team as well.
I am motivated by the curiosity that drives all people, only I find my curiosity focused on places such as Mars. I recall arriving at NASA's Goddard Space Flight Center in early 1985, fresh from graduate school and literally itching to measure the "unmeasurables" of Mars. Having worked with the Viking lander camera data for years, I was driven to find a way to measure aspects of the Martian landscapes that could help explain their genesis and ultimately whether they could hold clues to ancient environments, some of which could have been hospitable for biological processes (life). I met up with a couple of truly wonderful laser engineers almost by accident within weeks of my arrival at Goddard: Jack Bufton and Jim Abshire. Both were incredibly impressive and "can do" and both inspired me to explain my dream to them -- how to measure the lay of the land on Mars from orbit at human dimensions. Each of these brilliant engineers came to the conclusion that a laser altimeter might be the way to go. We instantly forged a working relationship, and several years later, we had MOLA as the first planetary mapping laser altimeter aboard the ill-fated Mars Observer, and then of course aboard the Mars Global Surveyor.
Ever since I was a child, I was more interested in understanding nature, in the form of rocks, insects, fungi, etc., than other things.... So, I suppose my passion for nature afar, for example, the landscapes on Mars, is what has driven me both to work on MOLA and MGS, but also most recently to come to NASA headquarters to help formulate our science strategy for Mars so that we can explore our neighbor planet ultimately at scales people can relate to. I am a born explorer and love the history of exploration. Now I can vicariously explore Mars by helping to send robotic adjuncts of people here on Earth to Mars to measure its mysteries. Why shouldn't a wonderful writer such as Larry be exposed to the many factors that motivate us to explore Mars?
Finally, let me say that we are very very fortunate to have the support of the people of our country to explore Mars as a kind of "natural control experiment" for understanding aspects of the workings of our own home planet, Earth. When I walk across landscapes here on Earth that I believe represent microcosms of some of those we observe on Mars, it feels like "being there." I can imagine those first bold human explorers trekking across Mars in some future time, seeking to discover what our robotic explorers are now capturing as the foundation for this ultimate human voyage. A sense of "being there" permeates me when I visit a place such as Surtsey in Iceland, where for a brief moment I forget my usual earthly worries and think about how landscapes, climate, biology all interact here on Earth, and ultimately how they might have worked on Mars. It's a tremendous thrill. Anyway, my wife sometimes chides me for my emotional character, but I am a "nature person" first and that drives me to think about Mars. To be involved in setting the path for the voyages of discovery that could unearth the first signs of life anywhere other than here on Earth is a privilege that I take very seriously. That's why I was so forthright with Larry in the writing of his book.
B&N.com: Bridget, I understand that you have been inspired by Star Trek -- as have many in the field of space exploration. I'm something of a Trekker myself, and there are two new movies about Mars. In some part of the popular culture, it seems completely inevitable that humanity should continue its exploration of Mars. How does this compare to the reality of getting funding and how can the fans of space exploration help out?
Bridget Landry: I think it is inevitable, but it will also be a more expensive undertaking than any yet attempted in modern times. (Since I don't know what percentage of the global annual product was consumed by projects such as the pyramids, I can't say "in all history.") Even with some of the new lower-cost plans that are being investigated, putting humans on Mars is much more complicated than landing them on the moon. The other point is that there has been a great deal of criticism about the way that the U.S. went to the moon -- it was done almost as a stunt, with little preparation for long-term residency. The result is that, 30 years after Apollo 11, we don't have any permanent presence on the moon and no plans for going back. This is not the way we should go to Mars (it would be a hell of an expensive "stunt"), so it might take a little longer to get there than an Apollo-like program, but the results -- long-term residency on another planet -- would be well worth the additional wait.
As for how those interested in this issue can influence political support for the space program, the simple answer is to be the squeaky wheel. Write your Congress-critters, making sure that they understand how important space is to you, and write often. Email and phone calls are good, but letters carry more punch. Also, there are many groups that lobby for space, such as the National Space Society, the Planetary Society, and the Mars Society. Joining one (or all) of these groups allows you to get more effect out of your efforts, combining them with those of others who feel the same way. In addition, getting kids interested in space is a good way to raise voters who will look at those issues when they go to the polls. (I'll get off my soapbox, now...)
B&N.com: Historically new instruments and technologies have often revolutionized science -- revealing new data that had previously been inaccessible. Robert, can you tell us about your work on the laser altimeter now orbiting Mars?
Robert Afzal: I was the lead for the laser in MOLA (Mars Orbiting Laser Altimeter) and responsible for making sure the laser would perform as needed to make MOLA successful. MOLA is an instrument including a laser, telescope, detector, and processing electronics. It represents a new generation of instrument technology for space science and exploration. MOLA was made possible by the development of a new technology called semiconductor laser arrays. They're related to the same technology used in CD players and what is now revolutionizing the telecommunications industry, only much more powerful. MOLA's earlier cousin, which flew on the ill-fated Mars Observer mission, was the first laser instrument in space to utilize this all solid-state laser technology. This enables us to build science instruments that are small, efficient, lightweight, and can last for months to years operating in space. We can now send laser instruments for science investigations like topographic mapping and atmospheric studies to all sorts of places never before possible. In fact since MOLA, NASA has sent laser instruments to the moon, an asteroid, and has several Earth-orbiting missions scheduled for launch in the next couple of years. Many more are in the works, and someday commercial communication satellites will use similar laser technology to beam high-speed data around the world.
B&N.com: The new data coming in from MOLA and other sources has changed our understanding of Mars. The Red Planet appears to be more active and a more likely environment for life either in the past or perhaps even still existing. Can you describe what we've found out so far?
JG: Well, MOLA has changed everything for me -- when all of this started way back in 1985, we could only imagine what Martian landscapes in 3D would look like at the scales we have now measured them on a global basis! Knowing the topography of the entire surface of a planet whose surface area is similar to that of the continental land area of our home planet, Earth, to unheard-of accuracies, offers tremendous potential for discoveries.
While we as scientists formulate hypotheses to test with our measurements, sometimes what becomes possible thanks to a new frame of reference or perspective, changes how we understand nature, and in this case, Mars. Let me be more specific. My own personal goal for Mars was to understand what the "anatomy" of ubiquitous impact craters can tell us about its thin outer skin or crust and the history of water within that part of Mars. I never expected to measure huge impact craters that were filled above the level of their rims with "stuff," some of which is very likely to be ice.
Indeed, when we measured our first topographic cross-sections of many of the giant impact craters near the Martian polar caps, I was driven to speechlessness (a rarity for me). The craters appeared to have frost-covered "plugs" of materials rising above their mountainous rims from within, in ways that we are unaccustomed to here on Earth or even on the moon. MOLA showed us a new part of the history of Mars, thanks to these observations. It's very possible that the record of climate change on Mars supports huge advances and retreats of the Martian polar ice caps just as, the advancing ice cap could literally bury the mile-deep craters in the higher latitudes with ice and dust, above the level of their rim mountains. Later, during warmer times, tall plugs of materials that poke above the crater rims are all that now remain of a former ice age.
This is but one of the amazing discoveries made by MOLA. Others include discovery of vast, featureless plains in places as flat as dry lake beds here on Earth. MOLA has accurately measured the thickness and volume of the north and south polar caps of Mars, providing much-needed information about the hydrologic cycles of Mars. Most recently, I have been involved using MOLA's measurements to make the first roughness map of an entire planet at football-field resolution. This map shows us how mundane the lay of the Martian landscape can be, but also reveals where the surface is as rough as a forest-covered plain here on Earth (of course, we haven't yet found trees on Mars).
Again, Mars simultaneously dazzles and shocks us at every turn. The work of MOLA is far from over, and the scientific research papers describing how it has transformed our understanding of the mysteries of Mars have only just begun. However, it is safe to say that MOLA and its legacy of hundreds of millions of precise measurements of the Martian surface today provides a unique reference frame for exploring the context of all of our observations of the magical and often mysterious Red Planet.
B&N.com: Larry, is there anything else you'd like to say about the book?
LB: I wrote a book to shine a light on some of the most underappreciated associates of NASA -- its scientists. These men and women seem so important to me because they have their hands on the levers of the future. They are creating the paradigms that will define the course of exploration over the next couple of hundred years, as people begin to move outward from the planet, and I wanted to show readers what they're like as people, what motivates them, and how their dreams will transform life on Earth.