It’s hard to look for something you’ve never seen before – and that might not even exist. But you have to start somewhere.
NASA’s Perseverance rover landed on Mars in February 2021. Its mission is to search for signs of ancient alien life via rock samples it collects and stashes for a future mission to retrieve.
Why do astronomers look for signs of life ... for extraterrestrial life is on planets within our solar system. NASA’s Viking 1 mission began orbiting Earth’s neighbor Mars back in 1976.
The Viking 1 scientists designed the lander to look for signs of photosynthesis happening on Mars. To do that ... hold planets that host life. Credit: ESA/Hubble/NASA Looking for life on ...