In the pursuit of space exploration, humans have broken records that were previously thought impossible. At the same time, terrible accidents have marred the history of space flight, making later ...

Since our distant forebears first leaped from high rocks into water, tamed horses, or strapped strips of wood to their feet to slide down snowy mountainsides, humankind has found speed thrilling—and ...

Since its groundbreaking invention in 1939, the helicopter has steadily transformed the world of transport, though it took a decade or two to really reach its potential. The Korean War served as the ...