Season 40
Will future asteroids trigger massive extinctions—or be mined for precious minerals?
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Asteroid: Doomsday or Payday?
Can scientists unravel the mysterious phenomena that lurk between Earth and space?
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At the Edge of Space
Which technologies worked in the race to track down the men behind the marathon attack?
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Manhunt—Boston Bombers
Can science help us understand why some people commit horrific acts of mass murder?
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Mind of a Rampage Killer
A team uncovers the advanced engineering behind an ancient Egyptian war machine.
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Building Pharaoh's Chariot
Shared DNA reveals a deep connection with our long-vanished human cousins.
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Decoding Neanderthals
Could the explosion of Iceland's ticking time bombs cause cold and famine worldwide?