To: Westlander
I would think O2 would be a much more reliable indicator. The 21% O2 vs. 0.03% CO2 in our atmosphere was created artificially by billions of years of plant life. A planet with unexplained green tinges would also be a likely candidate.
11 posted on
11/24/2008 4:26:52 AM PST by
Reeses
(Leftism is powered by the evil force of envy.)
To: Reeses
Wasn’t this planet like a greenhouse while the dinosaurs lived here?
14 posted on
11/24/2008 4:51:27 AM PST by
autumnraine
(Churchill: " we shall fight in the fields and in the streets, we shall never surrender")
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson