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What Are UFOs?

What Are UFOs?

Season 52 Episode 1
53:43
Extreme Airport Engineering

Extreme Airport Engineering

Season 52 Episode 2
53:40
Dino Birds

Dino Birds

Season 52 Episode 3
53:40
Egypt's Tombs of Amun

Egypt's Tombs of Amun

Season 52 Episode 4
53:40
Pompeii's Secret Underworld

Pompeii's Secret Underworld

Season 52 Episode 5
53:40
Baltimore Bridge Collapse

Baltimore Bridge Collapse

Season 52 Episode 6
53:32
Revolutionary War Weapons

Revolutionary War Weapons

Season 52 Episode 7
53:39
Secrets of the Forest

Secrets of the Forest

Season 52 Episode 8
53:41
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NOVA

4 Ways the Universe Could End

If the universe as we know it started with the Big Bang, will it also have an end? And if it’s going to end someday - how? Discover the four main ideas about how the universe might end, and find out which one has the most evidence supporting it. With host Athena Brensberger, dive into our universe's very distant future in this episode of What the Physics?!

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Season
Nazca Desert Mystery
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53:31
Who created the Nazca lines and why? New clues to one of the greatest ancient enigmas.
Ocean Invaders
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53:32
Meet one of the ocean’s most beautiful and destructive species: Lionfish.
Can Psychedelics Cure?
53:47
Psychedelics are unlocking new ways to treat conditions like addiction and depression.
Computers v. Crime
53:30
Is artificial intelligence making policing and courts fairer, or is it increasing bias?
Rebuilding Notre Dame
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53:43
A team tackles the restoration of iconic Notre Dame Cathedral.
Saving Venice
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53:31
Can innovative engineering projects save Venice?
Ending HIV in America
53:33
Can innovative drugs and therapies finally end HIV?
Ice Age Footprints
53:43
Ancient footprints provide new evidence of humans and extinct giant beasts of the Ice Age.
Why Ships Crash
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53:20
How could a single ship cause a major supply chain crisis around the globe?
Great Mammoth Mystery
53:16
Sir David Attenborough explores a site with traces of ancient mammoths and Neanderthals.
Arctic Sinkholes
53:30
In the Arctic, enormous releases of methane, a potent greenhouse gas, threaten the climate
Ancient Maya Metropolis
53:31
Explore great ancient Maya cities and why their inhabitants abandoned them.
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