In the summer of 1976, two intrepid spacecraft reached Mars after nearly a year of galactic traveling. Named Viking 1 and 2, they were the first spacecraft to land on another planet.
The spacecraft were designed to collect information from Mars to send back to Earth. One of the main goals was to search for evidence of life on the Red Planet.
“I recognized it was going to be a tremendous challenge,” said Viking manager John Newcomb, in a NASA interview. “It was a scientific challenge. I mean the science on board was the likes of which we just hadn’t done before.”