Science news this week: Life on Mars, weird water and a curious human cousin

Science news this week: Life on Mars, weird water and a curious human cousin Yahoo A Mars rover found organic carbon just sitting on a rock Science News Nasa rover detects potential signatures of ancient microbial life on Mars The Guardian In one drilled Martian rock, Curiosity found 21 organic molecules — seven never before detected on Mars — including a nitrogen-bearing ring structure that belongs to the same chemical family as precursors to RNA and DNA. Space Daily Possible signs of ancient life on Mars are rich in complex carbon New Scientist