http://www.history.com/shows/how-the-earth-was-made#show-schedule History Channel - Show Schedule for next 2 weeks en Copyright 2012, History.com Thu, 24 May 2012 04:00:00 GMT History.com 2012-05-24T04:00:00Z en Copyright 2012, History.com http://www.history.com/shows/how-the-earth-was-made/episodes/season-1#episode-2 The Great Lakes of North America are the largest expanse of fresh water on the planet. Searching for clues of their formation, our geologists delve deep into an underground salt mine, investigate a fossilized coral reef, climb an Alpine glacier, and dive to the bottom of Lake Superior. They find evidence of an ancient tropical sea, a mighty rift that almost tore the continent in half, and a mile high ice sheet that repeatedly carved its way across North America. And as the lakes settle to their current levels, cascading over Niagara Falls, we find that their evolution is far from over. 236853 http://www.history.com/shows/how-the-earth-was-made/episodes/season-1#episode-4 Yellowstone National Park is one of the most dangerous geological features on Earth. In trying to uncover the processes behind Yellowstone's main attractions like "Old Faithful," geologists came to the frightening realization that Yellowstone was in fact a vast hidden super-volcano--one that is overdue for a massive eruption. Yellowstone has been on a regular eruption cycle of 600,000 years but the last eruption was over 640,000 years ago, so the next is overdue. An eruption at Yellowstone could be 2,500 times the size of the 1980 Mount St. Helens event. In the past 16.5 million years, the volcano has mysteriously moved hundreds of miles though Nevada across southern Idaho to reach its present location in Yellowstone. But even today it is still active. A swarm of 500 earthquakes hit the park early in 2009 and geologists found that the entire park is being pushed up into the air by hidden forces under the ground. Is this sleeping giant beginning to stir? 236851 http://www.history.com/shows/how-the-earth-was-made/episodes/season-2#episode-11 Africa's Sahara Desert is the size of the United States, making it the largest desert in the world. It's also the hottest place on the planet. But now an astonishing series of geological discoveries has revealed this searing wasteland hides a dramatically different past. Scientists have unearthed the fossils of whales, freshwater shells and even ancient human settlements. All clues to a story that would alter the course of human evolution and culminate in biggest climate change event of the last 10,000 years. 236852