Solar System
What do you think of the possibility of life in our solar system?
Saturn's moon Titan, for example, *could* support life. Other moons may have seas underneath mile-thick ice that could harbor life.
What do you think? Is this solar system only home to one hospitable planet? Will we have to search light years away for the next planetary system in our quest to find other life forms?
I think it's highly unlikely that Mars is totally barren. We'll find microbes there. They'll be related to Earth life. There's plenty of material transfer between the two planets over geologic time, and we've shown that microbes can survive the trip. No current guess if the methane mapped there is microbe or geologic based. Either is exciting.
Europo, Ganymede, Callisto and Ceres all have ice, possibly over salt water. Ceres doesn't have the gravitational heating, but also doesn't have Jupiter's radiation.
Enceladus has what surely looks like water. It's pretty cold.
Titan's surface is pushed around by the wind(!). That suggests an ocean of something underneath. Titan is cold enough that, if there is life, it's advanced to about the 10 million year level. Not very far. Could be warmer deeper down, though. At least there's no shortage of organic chemistry.
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