In honor of a slew of new results coming from NASA's Curiosity rover, here's a two-minute simulation of our current best-bet for how the martian environment has evolved over the past 4 billion years. From temperate and wet to frigid desert. Credit: NASA's Goddard Space Flight Center Conceptual Image Lab.
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ABOUT THE AUTHOR(S)
Caleb A. Scharf is director of astrobiology at Columbia University. He is author and co-author of more than 100 scientific research articles in astronomy and astrophysics. His work has been featured in publications such as New Scientist, Scientific American, Science News, Cosmos Magazine, Physics Today and National Geographic. For many years he wrote the Life, Unbounded blog for Scientific American. Follow Caleb A. Scharf on Twitter