okay, let's go with this. let's imagine that by 65 million years ago, the dinosaurs had evolved intelligence (this didn't really happen), and they also had a space program. they deflected the asteroid that would otherwise have killed them off, and then they continued exploring the solar system. according to the mercury article from 2018 links to an external site., why wouldn't they have found any ice in the psr craters on mercury, even though such ice probably existed on the earth's moon at that time?