Since February, researchers have found and gathered 16 individuals of the species to use in a breeding program.

William James Sidis, Marilyn vos Savant, and Leonardo da Vinci have some of the highest IQs in history — but are they really the world's smartest people?

The ruins, named Ocomtún, date back to the time of the collapse of Maya civilization in the Yucatán lowlands.

The 335-foot-tall cypress tree is believed to be the second-tallest tree in the world.

Originally built in the 13th century, Frankenstein Castle is largely in ruins today — but its potential ties to Mary Shelley's iconic horror novel have made it one of the most popular burgs to visit in all of Germany.

The waka is believed to have been hidden by the Māori people in 1869 to prevent British colonizers from confiscating it.

The ancient mummy is thought to have been sacrificed as part of a ritual surrounding the completion of a temple.

From the Little Albert Experiment that terrorized a helpless infant to the Monster Study that tried to turn non-stuttering children into stutterers, these are some of the most disturbing psychology experiments ever performed on humans.

Our Living Islands is an initiative that aims to revitalize the Irish islands by restoring their dwindling populations and adding a host of other quality-of-life improvements.

Between February and May 1971, Juan Corona killed 25 migrant workers with a machete and buried their bodies in crude, shallow graves near Yuba City, California.