Skip to main content
Access to this video is a benefit for members through PBS Passport.

Up Next

When Whales Could Walk

When Whales Could Walk

Season 51 Episode 1
53:31
Easter Island Origins

Easter Island Origins

Season 51 Episode 2
53:17
Building the Eiffel Tower

Building the Eiffel Tower

Season 51 Episode 3
53:29
Hunt for the Oldest DNA

Hunt for the Oldest DNA

Season 51 Episode 4
53:10
A.I. Revolution

A.I. Revolution

Season 51 Episode 5
53:30
Great American Eclipse

Great American Eclipse

Season 51 Episode 6
53:34
Secrets in Your Data

Secrets in Your Data

Season 51 Episode 7
53:40
Decoding the Universe: Cosmos

Decoding the Universe: Cosmos

Season 51 Episode 8
53:38
Solar System: Storm Worlds

Solar System: Storm Worlds

Season 51 Episode 9
53:34
Solar System: Strange Worlds

Solar System: Strange Worlds

Season 51 Episode 10
53:34
Solar System: Volcano Worlds

Solar System: Volcano Worlds

Season 51 Episode 11
53:34
Solar System: Icy Worlds

Solar System: Icy Worlds

Season 51 Episode 12
53:34
Back to Show
NOVA

Lee and Liza's Family Tree

Season 50 Episode 18

With the help of scientists and genealogists, filmmaker Byron Hurt and his family members search for their ancestors. Follow their journey as they hunt for new details of a history long obscured by the enduring legacy of slavery.

Watch Preview
Available Until
11/22/2026
Support Provided By
Season
Ocean Invaders
Unlock with PBS Passport
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
Unlock with PBS Passport
53:43
A team tackles the restoration of iconic Notre Dame Cathedral.
Saving Venice
Unlock with PBS Passport
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
Unlock with PBS Passport
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.
Alaskan Dinosaurs
53:21
Intrepid paleontologists discover that dinosaurs thrived in the Arctic’s cold and dark.
Active loading indicator