4 ms·

Alternatively, given that the majority of the planet is water and we kind of can't really imagine a biology without it, the universe could be full of fish plane

• PaulHoule 4y ago
  It is just the majority of the Earth’s surface that is covered with water. If you go outside the frost line most of the mass of many bodies is water. A generic outer solar system body (Europa, Ganymede, maybe even Pluto) has underground oceans. Inner solar system bodies have Goldilocks problems. Part of the Fermi paradox resolution may be that most life arises or will arise outside the frost line and those people will look at inner solar system bodies and assume out of hand that they are uninhabitable. If there were grabby aliens of that sort (or even our sort) the real prize in our solar system would be worlds that have a good combination of ice and rock like maybe Ceres, Pluto, etc. To an interstellar species which runs on D-D fusion, it’s a fairly certain bet that you can find some ice world which can be disassembled and turned into a ‘small ringworld’ with a larger habitable area that a planet like Earth which might turn out to not be habitable at all.