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Are We Ready for a Cyber Attack?
Cyber threats from nation states and lone hackers are a persistent threat to America’s cri
Clip: S42 Ep17 | 4m
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Live Tweeting Ancient History
The instant a key finding in human evolution was made, it was shared with the whole world.
Clip: S42 Ep15 | 1m 44s
Dawn of Humanity Preview
Deep in a South African cave, an astounding discovery reveals clues to what made us human.
Preview: S42 Ep15 | 30s
A Tsunami Strikes
When an unimaginably colossal tsunami hits Fukushima, the results are catastrophic.
Clip: S42 Ep14 | 2m 32s
Nuclear Meltdown Disaster Preview
Go inside the Fukushima power plants for the minute-by-minute story of what went wrong.
Preview: S42 Ep14 | 30s
Chasing Pluto Preview
Watch as the New Horizons spacecraft captures our first clear view of Pluto’s icy surface.
Preview: S42 Ep13 | 30s
A Pluto Flyby Dress Rehearsal
See key moments in NASA’s Pluto Flyby, as previewed in a 3-D simulation.
Clip: S42 Ep13 | 2m 52s
Secrets of Noah's Ark Preview
A team attempts to build the flood boat using inscriptions from an ancient clay tablet.
Preview: S42 Ep12 | 30s
DNA-Testing Reef Diversity
Marine biologist Laetitia Plaisance investigates species diversity in two coral reefs.
Clip: S42 Ep11 | 4m 17s
Sea Butterflies in Danger
Pteropod populations could decline or vanish due to rising ocean acidity.
Clip: S42 Ep11 | 1m 44s
Lethal Seas Preview
A unique coral reef in Papua New Guinea shows what the future may hold as oceans acidify.
Preview: S42 Ep11 | 30s
A Photomosaic of U-166
A high-res mapping expert pieces together thousands of images to make one wide shot.
Clip: S42 Ep10 | 1m 31s
Nazi Attack on America Preview
A sunken German U-boat off the coast of New Orleans tells the story of Operation Drumbeat.
Preview: S42 Ep10 | 30s
The Great Math Mystery Preview
Is math invented by humans, or is it the language of the universe?
Preview: S42 Ep7 | 30s
Colosseum: Roman Death Trap Preview
1500 years ago, how did the Romans engineer bloody spectacles and reenact sea battles?
Preview: S42 Ep6 | 30s
Colosseum Building Blocks
The Colosseum was built in just several years due to a clever use of repeating arches.
Clip: S42 Ep6 | 2m 4s
Petra: Lost City of Stone Preview
How did early engineers carve tombs into rock cliffs and funnel water to this desert city?
Preview: S42 Ep5 | 30s
Hagia Sophia: Istanbul's Mystery Preview
How has this unique structure, built on a seismic fault, survived centuries of quakes?
Preview: S42 Ep4 | 30s
Sinkholes—Buried Alive Preview
The catastrophic collapse of the ground beneath our feet is a growing worldwide hazard.
Preview: S42 Ep3 | 31s
Sunken Ship Rescue Preview
A team of 500 engineers and divers struggle to raise the Costa Concordia cruise ship.
Preview: S42 Ep2 | 30s
The Universe, Asymmetry, and You
The universe's symmetry was shattered by a quantum fluctuation, allowing life to exist.
Clip: S42 Ep1 | 2m 59s
Big Bang Machine Preview
Explore the deepest mysteries of the early universe and the quest to find the Higgs Boson.
Preview: S42 Ep1 | 30s