The Limits of Our Vision

For the last two point five million years, there is widespread physical evidence of things like climate change. You have to depend on drilling, mining and occasional exposed sections of the earth. Even in the ocean, seta in evidence, apparently, only goes back to around 170 million years ago. Y i think for me, this was actually one of the most interesting parts of the paper, because i would say, if you just go by standard intuition, a person might think, ah, you know, we'd see evidence of it all around us? Wouldn't there be ruins?"