Up Next
Back to Show
NOVA
U.S. Polio Vaccines: Then and Now
The polio vaccine's history extends more than fifty years.
Support Provided By
Unlock with PBS Passport
53:47
See how Earth transformed from a barren hellscape to a planet capable of sustaining life.
53:31
Who created the Nazca lines and why? New clues to one of the greatest ancient enigmas.
53:43
Ancient footprints provide new evidence of humans and extinct giant beasts of the Ice Age.
53:16
Sir David Attenborough explores a site with traces of ancient mammoths and Neanderthals.
53:30
In the Arctic, enormous releases of methane, a potent greenhouse gas, threaten the climate
Unlock with PBS Passport
53:17
Intrepid paleontologists discover that dinosaurs thrived in the Arctic’s cold and dark.
Unlock with PBS Passport
53:28
Take a tasty look at insect foods that could benefit our health and our warming planet.