This 4.2-billion-year-old fossil could lead to the discovery of life on Mars

Fossil shows life on Mars.
(Image credit: NASA/Getty Images)

The oldest known fossil on Earth could be the key to discovering alien life, researchers believe. The newfound microscopic bacteria unearthed in a rock formation in Quebec, Canada, would have lived in hot ocean vents 4.2 billion years ago — vents that also existed during the same period in the oceans of Mars.

The bacteria is "the strongest evidence yet that similar organisms could also have evolved on Mars, which at the time still had oceans and an atmosphere, and was being bombarded by comets which probably brought the building blocks of life to Earth," The Telegraph writes.

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Jeva Lange

Jeva Lange was the executive editor at TheWeek.com. She formerly served as The Week's deputy editor and culture critic. She is also a contributor to Screen Slate, and her writing has appeared in The New York Daily News, The Awl, Vice, and Gothamist, among other publications. Jeva lives in New York City. Follow her on Twitter.