Jack London became so enamored with a dog he met while prospecting for gold in the Yukon Territory that he used their bond to create one of the 20th century's most iconic works of literature.

"Neanderthal Swiss Army Knife" uncovered, vanished ship found in Bermuda Triangle, Earth's oldest meteor crash site discovered.

Ancient Egyptian murder mystery solved, mysterious population of human ancestors uncovered, 3,000-year-old mummy's voice resurrected.

Grisly remains of mammoth hunted by humans found, ancient Egyptian map of the underworld uncovered, Christopher Columbus' tales of cannibals perhaps proven true.

500-year-old leprosy victim's face reconstructed, Viking runestone's message deciphered, Amazon warrior women's tomb uncovered.

Additional warriors of China's ancient Terracotta Army found, mystery of intact 2,600-year-old human brain solved, century-old headless body from Idaho cave identified.

Like many Christian sects, Tsarist Russia's Skoptsy believed sex was a sin. Unlike most sects, they also believed that the only way to get to heaven was to cut off their own genitals.

Before the rise of photography in America, artists drew stunning "balloon maps" of their cities, giving ordinary citizens a bird's-eye view of their communities that they'd never seen before.

World's oldest-known fossil forest found, 1,200-year-old "piggy bank" dug up in Israel, ancient Mayan palace uncovered.

Harlequin ichthyosis, a genetic disorder that results in overly thick skin that's prone to cracking, used to mean certain death. Now, some people with the condition have lived into their 30s.

These daguerreotypes from the 1840s and '50s — newly restored in vivid color — capture a generation of Americans that lived through the Revolutionary War and the execution of Marie Antoinette.