When the Nazi airship Hindenburg exploded in a giant ball of fire, the world's largest aircraft in history became one of its greatest catastrophes, and now, new technology…

Cutting-edge technology is helping experts investigate the Bermuda triangle. Using new techniques, they search for evidence of aliens on the ocean floor.

When Pompeii was destroyed by an apocalyptic volcano, another town was destroyed, too - Herculaneum. It is one of history's most perfectly preserved towns.

The Roman Empire built Hadrian's Wall to guard its frontiers; new discoveries reveal who the Romans were trying to keep out with this 72-mile-long megastructure.