Meteor study pours cold water on warm Mars theory CNN

A study of meteorites chipped off the surface of Mars suggests the planet has been frozen for 4 billion years and probably never had the warm wet conditions that could have given rise to life, two researchers said Thursday. Their study of two meteorites that fell to Earth suggests they were never in warm conditions. The report, published in the journal Science, contradicts theories the now-frozen planet may once have been warm enough for life to have arisen.