Evidence of Life on Mars Found in the '70s, Says Former NASA Scientist

Dr. Gilbert Levin says in Scientific American that a NASA experiment he led during the Viking mission in the 1970s found evidence of life on the Red Planet, and that future Mars missions should have life detection experiments.
Published: 11:28 AM CDT October 15, 2019
Updated: 10:44 AM CDT October 15, 2019