Study : Mars on Mars , more than 3.5 billion years ago . Scientists say some features that looked like impact craters were formed instead . Water discovered in Martian soil . The best candidate is called Eden Patera . More research needs to be done to confirm .
Study : Mars on Mars , more than 3.5 billion years ago . Scientists say some features that looked like impact craters were formed instead . The best candidate is called Eden Patera . More research needs to be done to confirm .