As NASA's Perseverance rover inches along on Mars in search of hints of ancient life that may have once flourished there, scientists back home are honing their skill to identify such signs by studying fossils of Earth's oldest lifeforms.

Clues to spotting life on Mars are right here on Earth

Source: space
Source Link: https://www.space.com/search-for-life-mars-aided-by-investigating-fossils-earth