methane on mars

Where Does Mars’ Methane Go? New Study Provides Possible Answer, with Implications in the Search for Life.

Where Does Mars’ Methane Go? New Study Provides Possible Answer, with Implications in the Search for Life.

For centuries, scientists have speculated about the existence of life on Mars. But it was only within the past 15 years that the search for life (past and present) really began to heat up. It was at this time that methane, an organic molecule that is associated with many forms of life here on Earth (i.e. a “biosignature”) was detected in Mars’ atmosphere.

Methane on Mars: a new discovery or just a lot of hot air?

Methane on Mars: a new discovery or just a lot of hot air?

The discovery of life on Mars would get pretty much everyone excited. But the scientists hunting for it would probably be happy no matter what the outcome of their search – whether life turned out to extinct, dormant or extant. They’d even consider finding no evidence of life whatsoever to be an important discovery. But, as the saying goes, absence of evidence is not evidence of absence, and it will take many decades of detailed exploration of Mars to be reasonably sure that life has always been absent there.