Curiosity finds no sign of methane on Mars — but does that mean there's no life?

NASA's Curiosity rover has been sniffing out Mars' atmosphere in search of methane. Methane is a precursor chemical for life. It's also thought that 95% of the methane in Earth's atmosphere is organismal in origin. Methane on the Red Planet would therefore be suggestive of past or present life. » 11/02/12 12:58pm 11/02/12 12:58pm

The Moons of Mars may be the first place we find extraterrestrial life

Was there ever life on Mars? In fact, could there still be microbes living on Mars now? It's still a distinct possibility. But given the difficulties involved in sending people and specialized equipment to Mars to look for samples, we could be waiting decades to find out. So it's a good thing there's a ready… » 7/02/12 1:31pm 7/02/12 1:31pm

Why Silicon-based Aliens Would Rather Eat Our Cities Than Us

What would non-carbon-based life really be like? What would it want from us? Bruce Dorminey, science journalist and author of "Distant Wanderers: The Search for Planets Beyond the Solar System," interviews NASA astrochemist Max Bernstein about the possibility of silicon-based life, in an article from Universe Today. » 12/05/11 2:30pm 12/05/11 2:30pm