I wonder if life forms on other planets might use different bases in its DNA. Or if it had DNA at all. Silicon polymerizes nicely and could form the basis for self-replicating molecules, perhaps. I hope they are sterilizing everything so we don't go seeding Earth life on these worlds before we can learn anything about them. I wonder where they are going to get the fuel for a hot air balloon in an atmosphere of methane? What if the atmosphere is combustible, and by lighting a hot air balloon we cause the whole atmosphere to go up in smoke? I'm sure someone has that angle covered, but it seems like a stumbling block nonetheless.

Fascinating to speculate on the forms life might take on other worlds.

If you don't care for reality, just wait a while; another will be along shortly. --A Rose