Up Next
Back to Show
NOVA
How Long Does Covid-19 Immunity Last?
A person who has been vaccinated against COVID-19 will have a slightly different immune response to the coronavirus than someone who was previously infected, researchers say. How long does immunity last—and is it all about antibodies?
Support Provided By
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.
Unlock with PBS Passport
53:28
Join the hunt for the universe’s most common—yet most elusive and baffling—particle.
53:36
As state-legalized cannabis spreads, NOVA explores its little-known risks and benefits.
