In 1882, General Philip Sheridan's expedition to the protected buffalo haven in Yellowstone National Park revealed a gruesome reality: Poachers were continuing to slaughter the last remnants of America's big-game icon.

By 1951, two thirds of Americans lived in urban areas. Enter William Levitt, a former navy lieutenant, who would utilize construction techniques he learned in the military to build affordable suburban homes.

In 1937, Amelia Earhart was about to embark on a record-setting flight around the world. In her final moments, she took her last photograph and set off from a Burbank, California airstrip, captured in recently recovered home movie footage.

Kevin Richardson has tried for over a month to train hyenas Maxi, Woody, and Ringo to climb on board their special travel cage in order to transport them safely to their new retreat. But things take a turn when Ringo darts off, complicating the move and forcing the team to get creative.

Hammerhead sharks are so attuned to low-frequency sounds, they can hear them from over a mile away. Not only can they tell the distance and direction of their prey, they can even estimate its size.

One of the social side effects of Prohibition was it inspired many women to break out and challenge the conservative norms of society. These women were dubbed 'Flappers.'

In the Ethiopian highlands, native Geladas have impressive canines despite being grass eaters. The reason is simple: The males need to defend themselves and their group against potential challengers.

During World War I, the British converted a large number of commuter train cars into ambulance cars. These mobile hospitals had the facilities to cater up to 500 men.

If the prospect of a spider that catches fish wasn't scary enough, the fishing spider is disturbingly well-adapted to its task. This includes walking on water, as well as breathing underneath it as it stalks its prey.

As U.S. marines advanced northward in Okinawa, they approached a craggy mass known as Mount Yae-Take. The battle to capture this remote mountain resulted in numerous casualties on both sides.