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

Australia's First 4 Billion Years: Strange Creatures
After a massive extinction, diverse marsupials came to dominate this isolated continent.
Australia's First 4 Billion Years: Strange Creatures

Australia's First 4 Billion Years: Monsters
Some 250 million years ago, some of the largest, most dangerous reptiles ruled this land.
Australia's First 4 Billion Years: Monsters

Australia's First 4 Billion Years: Life Explodes
Fossils reveal how life’s explosion in the ocean was recreated on dry land.
Australia's First 4 Billion Years: Life Explodes

Australia's First 4 Billion Years: Awakening
Australia’s landscape holds clues to Earth's early history and the beginning of life.
Australia's First 4 Billion Years: Awakening

A meteor burst into a fireball over Siberia. Can we spot the next deadly asteroid in time?
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Meteor Strike

Can science help us understand why some people commit horrific acts of mass murder?
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Mind of a Rampage Killer

Detailed satellite images reveal the web of connections that sustain life on Earth.
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Earth From Space

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?
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