Archaeologists identify a series of unknown structures in Guatemala.

Experts investigate a structure built above the rain forests of Sri Lanka.

Scientists discover a fossil unlike any known animal, living or extinct.

In Colombia, a team of scientists discover an unidentified animal vertebra.

In the Philippines, archaeologists discover ancient rhinoceros remains.

Explorers discover ancient structures hidden on the island of Pohnpei.

A mysterious creature that glows in the dark is discovered at Lake Eacham.

A puzzling site containing large stone blocks is revealed on Kilwa Island.

On the island of Kolombagara, explorers uncover a mysterious man-made cave.

In Mexico, a rancher discovers dozens of skulls and bones on a cave floor.