New evidence that air pollution has masked the full impact of global warming suggests the world may soon face a heightened climate crisis.

NASA and the European Space Agency dispatch a two-part mission to study Saturn and its enigmatic satellite, Titan.

Driverless vehicles compete in a 130-mile race across the Mojave Desert.

Relive two legendary expeditions—one tragic, one triumphant—to pioneer a route through the Northwest Passage.

A 40-year hunt for solar neutrinos leads to a new understanding of matter itself.

David Attenborough probes the mysteries of ancient life-forms perfectly preserved in amber.

Forensic investigators tease secrets from the well-preserved bodies of people buried long ago in peat bogs.

Can medical science forecast why some people get sick climbing at high altitude while others don't? A team of doctors and climbers on Denali test the body's response to extreme cold.

Could a mummy exhibited for 140 years at an obscure museum in Niagara Falls be the remains of a long-lost Egyptian pharaoh?

Experts and eyewitnesses reconstruct the devastating floods that Hurricane Katrina unleashed on New Orleans.

Sir Isaac Newton, the eccentric genius who helped define modern science, was also an obsessive alchemist.

Is the Vinland Map a priceless depiction of the New World made before Columbus's voyage or a 20th-century fake

The story behind the world's most famous equation, E = mc2

The tragic WWII story of the Yamato, the largest battleship ever built.

What unleashed a catastrophic flood that scarred thousands of square miles in the American Northwest?