How Poaching Led to Serial Killer Elephants

When young bull elephants start killing off females, scientists realize that severe poaching not only skewed the sanctuary's gender balance, it also psychologically damaged these once gentle giants. (3:45)

Latest Videos

Preview thumbnail for video'Hammerhead vs. Stingray
Hammerhead vs. Stingray (2:25)
Preview thumbnail for video'The Incredible Things a Hammerhead's Nose Can Do
The Incredible Things a Hammerhead's Nose Can Do (1:24)
Preview thumbnail for video'What Ultra High Speed Penguin Footage Reveals About Pliosaurus
What Ultra High Speed Penguin Footage Reveals About Pliosaurus (2:51)
Preview thumbnail for video'Why Brown Bears Are Misunderstood
Why Brown Bears Are Misunderstood (2:17)
Preview thumbnail for video'How the Largest Flying Bird of All Time Stayed Airborne
How the Largest Flying Bird of All Time Stayed Airborne (3:55)
Preview thumbnail for video'What's the Waggle Dance? And Why Do Honeybees Do It?
What's the Waggle Dance? And Why Do Honeybees Do It? (2:49)
Preview thumbnail for video'Scorpions Choose Their Mates by Dancing With Them
Scorpions Choose Their Mates by Dancing With Them (2:11)
Preview thumbnail for video'A Look Inside This See-Through Frog
A Look Inside This See-Through Frog (1:01)
Preview thumbnail for video'Incredible: A Caracal Slaps Down a Bird in Flight
Incredible: A Caracal Slaps Down a Bird in Flight (3:14)