NASA's Perseverance rover has encountered another rock on Mars that has left scientists puzzled.

The molecules may be remnants of fatty acids, which form cell membranes in Earth’s organisms, though they might have formed ...

Curiosity found large organic molecules in a 2013 Mars rock sample. These fragments suggest Mars had the right chemistry for ...

We can’t say the molecules are the product of life, but the findings indicate if Mars had life billions of years ago, the ...