One day, in the 3rd Century BC, King Hiero II of Syracuse, Sicily, summoned Archimedes—a young, Greek physicist and mathematician, donning a long, flowing, white beard—to verify that his new crown was ...

Archimedes didn’t really invent a death ray. But more than 2,200 years after his death, the ancient Greek’s inventions are still driving technological innovations — so much so that experts from around ...