Write the fist chapter of a detailed story narrated by David Attenborough, based on this what if scenario: (What if some creatures from 300 milion years ago, 260 milion years ago, 210 milion years ago, 150 milion years ago, 100 million years ago, 68 milion years ago, 50 milion years ago, 40 milion years ago, 30 milion years ago, 20 milion years ago, and 10 million years ago ends up in the Calabrian period 800 thousand years ago, in places with the proper temperatures for such creatures? What interaction with what species would they have? How would they change things?)