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Alien life likely can't survive on exoplanets smaller than Mars, scientists say | Independent Space News

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Published July 21st, 2026 8:15 PM

Updated July 21st, 2026 8:31 PM

ISN News Desk · Reporting based on Space.com

Alien life likely can't survive on exoplanets smaller than Mars, scientists say

For a world to maintain an atmosphere long enough for life to gain a foothold, it seems it needs to be at least as big as Mars.

Image: Space.com

For a world to maintain an atmosphere long enough for life to gain a foothold, it seems it needs to be at least as big as Mars.

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