Life on Mars is when living things live on the planet Mars. There are no living things on Mars at this time, but scientists think it is possible that there could be life there one day. Life on Mars means plants, animals, and maybe even people living there. It is very hard to live on Mars because it is very cold, there is no air or water, and sunlight is hard to come by. So, living things would need special equipment to survive and be able to move around. Scientists are doing experiments to try to find out if anything can live on Mars, which could help us learn more about life on Earth too.