Season 2 Episodes13
Cast1

Corey Johnson
Self - Narrator (voice)
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Ranked #12 of 13 in Season 2•−0.5 vs season avg
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

Corey Johnson
Self - Narrator (voice)
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"Sahara" is episode 4 of How the Earth Was Made season 2. It scored 7.8/10 from 39 votes, ranking #12 of 13 episodes this season (season average 8.3). It aired on December 15, 2009.