A fluke of gravity could turn millions of small scraps that populate the skies above Earth into projectiles, colliding in low orbit to spell certain disaster.

Black holes were once a theoretical phenomenon, but scientists now know that millions exist, and some of them have the potential to be lethal to earth.

The search for intelligent extraterrestrial life has captivated generations of humans, but the underlying danger that aliens are hostile is a real possibility.

Cataclysmic battles between galaxies are common across the universe and our own galaxy, the Milky Way, will face the neighboring Andromeda Galaxy.

Data collected during the Rosetta mission's groundbreaking journey to land on a comet for the first time in human history reveals answers about life on Earth.

On the island of Pohnpei in Micronesia, explorers discover ancient structures hidden beneath dense vegetation; a strange glowing forest is discovered in India.

On the island of Madagascar, paleontologists discover an intact fossil unlike any known animal, living or extinct; stone spheres are discovered in Costa Rica.

On the island of Kolombangara, explorers uncover a mysterious man-made cave in the dense jungle; a researcher finds two unknown animal skulls in Vietnam.

In Belize, researchers find a bizarre skeleton deep underground in a mysterious cave; an ancient city is discovered on a remote plateau in Cambodia.

Size up a vast animal vertebra found in a Colombian coal mine and a set of ornate bone-filled jars in the Cambodian rainforest and identify a rusty vehicle.

A puzzling site containing massive stone blocks is revealed on Kilwa Island; the discovery of giant animal bones baffle researchers in Australia.

Archaeologists identify an ancient site in Guatemala containing unknown structures; a lake full of jellyfish is studied on a remote South Pacific island.

From a Stone Age fisherman in Chile and a lost Egyptian city to mysterious mummies in China's Tarim Basin and a vast defensive system beneath Jerusalem.

Discover how ancient peoples fought, feasted and forged cultural connections across some of history's harshest landscapes in Mongolia and Iraq.

From a forgotten Egyptian temple carved into desert cliffs to one of the world's oldest ritual hunting sites in Jordan, recent discoveries redefine history.

New discoveries reveal how survival, belief, and state control have shaped human history across vast and unforgiving landscapes.

Stunning archaeological findings reveal how human resilience, belief and conflict shaped life in the world's harshest deserts.

Experts examine an ancient Egyptian cemetery and discover its links to historic weaponry, and later they investigate a lost South Asian society.