NASA’s Perseverance rover is exploring a dried-up lake on Mars.
It has collected rock samples that may hold signs of ancient life.
Organic molecules — the building blocks of life — have been found.
Mars once had rivers and lakes, making it a good place for life to exist.
Advanced tools on the rover are scanning for tiny signs of life.
NASA and Europe plan to bring these samples back to Earth in the 2030s.
Scientists believe we are now the closest we’ve ever been to answering: Was there life on Mars?