Why do hammerhead sharks have hammer-shaped heads?
A great hammerhead shark’s two eyes can be 3 feet apart on opposite sides of its skull. Ken Kiefer 2/Image...
A great hammerhead shark’s two eyes can be 3 feet apart on opposite sides of its skull. Ken Kiefer 2/Image...
Scenes like this one are becoming increasingly common in the Arctic. ALEXANDER GRIR/Contributor/AFP via Getty Images Thomas Scott Smith, Brigham...
Making room for wildlife: 4 essential reads Photographing a bear in Yellowstone National Park at a distance the National Park Service...