Secrets of the Sun
Examining the sun, which is 27 million degrees Fahrenheit.
Scientists examine evidence about Neanderthals that sheds light on the hominids, who died off some 30,000 years ago. See the 2010 reconstruction of the Neanderthal genome, which posits that modern humans and Neanderthals interbred.
Venom: Nature's Killer
Hunting down the most venomous animals to reveal their medical mysteries.
Australia's First 4 Billion Years: Strange Creatures
Australia's First 4 Billion Years: Monsters Preview
Some 250 million years ago, some of the largest, most dangerous reptiles ruled this land.
Australia's First 4 Billion Years: Life Explodes
Fossils reveal how life’s explosion in the ocean was recreated on dry land.
5/22/13 9:00 PM
5/23/13 2:00 AM
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A look at three Icelandic volcanoes (Katla, Hekla and Laki) that may be ready to erupt. Each is larger than Iceland's Eyjafjallajokull volcano, which caused havoc in air travel when it erupted in 2010.
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