Cosmic Rain: The Controversial Discovery of Small Comets

Every minute several huge "snowballs" break up as they approach the Earth and deposit a large cloud of water vapor in Earth's upper atmosphere. That's the startling finding that world-renowned physicist Louis A. Frank came to after studying the images from the Dynamics Explorer 1 spacecraft. His conclusion, based on data acquired at the limits of detection, created a storm of controversy among scientists. This is the story that was told in The Big Splash, published in 1990. But the story do...