Scientists hoped the first mission to Mars would reveal life on the red planet. What did the mission find?
- Percival Lowell believed there were canals and cities on Mars.
- In 1965, NASA probe Mariner 4 found no evidence of life on Mars.
- In 1976, Viking 1 landed on the surface of Mars to search for microbes.
- The Viking mission found no evidence of life on Mars, but the search continues.