Was there another civilisation on Earth before humans? Scientists investigate Prison Planet.com Posted on April 17, 2018 Posted in Aggregated No Comments Tagged with Sci Tech Metro | Fifty-six million years ago, the Earth warmed far above the temperatures we experience today – and ice at the poles melted. Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email