possible that some form of life is inside Martian rocks, but they haven't been tested yet. There seem to be green marks on some of the rocks. This hasn't been verified, and it probably won't be until a manned craft lands on Mars.
It may be that Mars can support life as we know it. For life to form, water is needed. Water on Mars is either frozen or in the air as vapor. In addition, Mars is bombarded by ultraviolet sunlight. Unlike Earth, Mars has no ozone layer to block out these deadly rays.
