About 66 million years ago, some 80% of ALL SPECIES ON EARTH became extinct -- at the boundary between the Mesozoic and modern eras. In every occurrence of the boundary, all over the world, there was always an odd layer of clay. When the thin clay layer was found to have high levels of iridium -- an element rare on Earth's surface -- things got interesting.
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About the Author
Stephanie Osborn, award-winning Interstellar Woman of Mystery, is a 20+-year space program veteran, with graduate/undergraduate degrees in astronomy, physics, chemistry and mathematics, and "fluent" in several more subjects. Author, co-author, or contributor to 40+ books, including the celebrated Burnout: The mystery of Space Shuttle STS-281 and the Cresperian Saga, she writes the critically-acclaimed Displaced Detective series, the Gentleman Aegis series, and the latest, the Division One series, her take on the urban legend of the mysterious people who make things...disappear. She "pays it forward," teaching STEM through numerous media including ebooks, radio, podcasting and public speaking, and working with SIGMA, the science-fiction think tank.