Water seems to flow freely on Mars
Is anyone else tired of hearing about the dangers of interplanetary contamination, particularly from the Earth to Mars?  I want to see the whole place terraformed and I can't imagine that we'd be so successful in our lifetimes that we'd wipe out whatever scientifically interesting traces of extant Martian flora there are.  Whether or not there was life on Mars is a fascinating question, but I think the more important one is when will we expand life on Mars?