New Theory Regarding Mars

And here I thought it was because Mars was too small and too far from the Sun:

Capitalism may be to blame for the lack of life on the planet Mars, Venezuela's socialist President Hugo Chavez said on Tuesday.

"I have always said, heard, that it would not be strange that there had been civilization on Mars, but maybe capitalism arrived there, imperialism arrived and finished off the planet," Chavez said in speech to mark World Water Day.

Chavez, who also holds capitalism responsible for many of the world's problems, warned that water supplies on Earth were drying up.

"Careful! Here on planet Earth where hundreds of years ago or less there were great forests, now there are deserts. Where there were rivers, there are deserts," Chavez said, sipping from a glass of water.