#455 – Adam Frank: Alien Civilizations and the Search for Extraterrestrial Life

1470.459 - 1495.926 Adam Frank

what i mean by that is that there really weren't many mountain ranges right the beginning of i think the term is orogenesis mountain building the true himalayan style giant mountains didn't happen until this more robust form of plate tectonics where the plates are really being driven around the planet and that is when you get the crusts hitting each other and they start pushing you know into these himalayan style mountains the weathering of that