The Antikythera mechanism: a 2,000-year-old computer from a shipwreck
Divers pulled a lump of corroded bronze from a Greek wreck in 1901. X-ray scans later revealed dozens of gears built to predict eclipses and planetary positions.
The Ghost Army fooled the enemy with inflatable tanks
A small unit of artists, sound engineers and designers in WWII staged fake divisions with rubber tanks, recorded troop noise and phony radio traffic.
Languages with only a handful of speakers left
Recording projects racing to save them.
How a mechanical watch keeps time
A spring, an escapement and a lot of patience.
The day the internet almost broke in 2008
A routing mistake took a video site offline worldwide.