Could Mars have supported life?

NASA’s Curiosity rover has found evidence of water on Mars and the basic elements that teeny organisms could have fed on, scientists said Tuesday. The results, derived from a rock sample, answer a key question about Mars: The Red Planet long ago did indeed harbor some of the ingredients needed for primitive life to thrive. Curiosity is the first spacecraft sent to Mars that could collect a sample from deep inside a rock and test it in its onboard labs.