Thirty years ago — July 20, 1976 — NASA’s Viking 1 became the first spacecraft to land on Mars and send back detailed pictures of the surface. The Vikings paved the way for NASA’s Mars exploration ...

When NASA's Viking 1 lander made history as the first spacecraft to touch down on Mars on July 20, 1976, it sent back images of a landscape no one was expecting. When NASA's Viking 1 lander made ...

Add Yahoo as a preferred source to see more of our stories on Google. NASA's Viking landers were the first spacecraft to successfully touch down on the surface of Mars. NASA/JPL-Caltech via AP Finding ...