NASA Just Announced The Discovery of Methane on a Distant Exoplanet
If there's one chemical that causes excitement in the search for biosignatures on other worlds, it's methane.
Methane, meaning farts? Which means possible organism?
There are many other ways of making methane, it's not a very complicated molecule: CH4. It gets exciting when there's a lot of it, because it's not the most energetically stable molecule.
EDIT: looks like the article goes into it.
Balaho anyone?