I don’t know. If there is life on Mars, though, it will be microscopic Martian bacteria living 8-10m or deeper underneath the sheets of ice at the north or south pole of that planet, because anything living on the surface would be killed by all the radiation, as Mars doesn’t have an atmosphere.
I don’t think there is life on mars. Although we have only looked at a tiny bit I think there would be more evidence that life was there. Although as Sam said it would only be backteria and it is possible it is hiding where we haven’t looked yet.
I think there may well have been life on Mars once. For a long time Mars was not too different from Earth. There were seas and rivers and an atmopshere. However, because Mars is smaller than Earth it struggled to keep its atmosphere, and water. Life evolved very quickly on Earth, and it is possible it did on Mars too. Maybe some bacterial life is still there somewhere.