Charles said:
BlackTiger said:
Umm... Earth is chalk full of organisms of all shapes and sizes that produce methane as a result of metabolic acitivity. Humans are among them...

The proof is everywhere.
Not to be a nuisance, but that's affirming the consequent. If A (life) then B (methane), B therefore A isn't a valid argument. Sure, it makes life probable, but doesn't exactly constitute as proof.

That's all I'll say Smiley Well, that, and "Cool! Methane!" Smiley