Can Birds Recognize Faces?
Season 44
Episode 20
About the Episode
Researchers caught, tagged, and released crows to see if they can recognize the face of a person who’s a threat. They discovered the crows were warning each other that the person in the mask was dangerous — even generations after it the initial capture.
Aired:
| Expires: | Runtime: 1m 57s
Recent Episodes
-
Episode 11, Season 52<br> Ultimate Crash Test: Impact
Forensic science is put to the test after the first-ever staged multi-vehicle pileup.| 53:27 -
Episode 10, Season 52<br> Ultimate Crash Test: Countdown
A first-of-its-kind experiment aims to stage a multi-vehicle pileup to gain new data on car safety.| 53:29
Extras
-
Why Does This Mummy Have So Many Tattoos?
Otzi, a 5,000-year-old mummy, has 61 tattoos arranged in 19 groups across his body.3:04 -
Einstein's Thought Experiment That Transformed Physics
The faster you move, the stranger time becomes.2:10 -
How Einstein Changed the Way We Understand Gravity
In 1912, Albert Einstein had a revolutionary idea.5:36 -
When Whales Could Walk (Español)
Fósiles gigantes en el Sahara revelan nuevos secretos sobre la evolución de las ballenas.53:30 -
How Harvard Discovered It Has an Original Copy of the Magna Carta
They paid only $27.50 for it from a London bookseller in 1946.3:13 -
What Fish Revealed About This Mysterious Grave
Could these bones be the last remains of a legendary Viking army?2:46 -
The Science of Scratch-Offs: What Your Brain Can’t Resist
You probably won’t win big playing the Lottery but your brain may want to keep trying.6:39 -
This Giant Telescope Will Reveal The Universe in Unbelievable Detail
Go behind the scenes as NOVA visits the Vera Rubin Observatory in Chile.5:59 -
Why Are There Stone Tree Trunks in the Arctic?
Fifty-million years ago these rocks were trees and this Arctic tundra was a steamy swap.2:50 -
This Massive Skeleton Belongs to an Ancient Whale
At first, scientists thought it was a gigantic marine reptile.2:28
