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Decoding Neanderthals
Shared DNA reveals a deep connection with our long-vanished human cousins.
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Mind of a Rampage Killer
Can science help us understand why some people commit horrific acts of mass murder?
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Manhunt—Boston Bombers
Which technologies worked in the race to track down the men behind the marathon attack?
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Building Chernobyl's MegaTomb
Engineers race to build a massive dome to contain the crumbling remains of the reactor.