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6:50
Researchers from the University of Washington conduct a long-term experiment
6:25
On the remote island of New Caledonia, crows are much smarter than anyone ever expected.
2:59
The people who knew Echo best reflect on their great loss.
3:53
The paradise tree snake can sail as far as 300 feet to get defend itself from predators.
3:46
Discover how a lion is able to bring down its prey, a hulking adult wildebeest.
3:27
Who would win a battle -- alligator or python? It all depends on which one is bigger.
4:45
An overview of how thousands of raccoons ended up in Japan and the dangers they pose.
5:21
Sound Recordist Dave Ruddick explains how he records surround sound in the field.
4:30
The crew gets creative when tides prove a challenge for filming on Admiralty Island.
