[Mind-numbed Robot]

Rhea is composed mostly of water-ice but is thought to include about 25 percent rock and metal.

I thought water was rare to non-existent elsewhere.

[sig226]

Water on Mars is rare. If found, it would suggest that the planet might have been able to support life, at least in cellular form, when it had an atmosphere. Mars’ atmosphere is long gone due to its low gravity.

nice ‘nic.