Primordial Haze Theory Competes with Primordial Soup in Debate over Life

Earth's Future Glimpsed on Titan — Composite view of Titan built with Cassini images taken on Oct. 9 and Oct. 25, 2006. (Image credit: NASA/JPL/University of Arizona)

Life on Earth may

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Michael Wall is the Spaceflight and Tech Editor for Space.com and joined the team in 2010. He primarily covers human and robotic spaceflight, military space, and exoplanets, but has been known to dabble in the space art beat. His book about the search for alien life, "Out There," was published on Nov. 13, 2018. Before becoming a science writer, Michael worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz. To find out what his latest project is, you can follow Michael on Twitter.