What form of evolution would you prefer...
Option 1: You can breathe underwater, and withstand all the pressures of the deep on earth, but you lose opposable thumbs and are hunted by creatures unknown to us
Option 2: You can live in the vacuum of space, but require regular consumption of heavy metals to live and deflect radioactive gamma rays. These can only be found on certain kinds of comets, which are sought after by others who will defend them with their life
