From the wheel 5,500 years ago to the birth control pill, these 20 inventions had huge ramifications ... through crystals to improve vision. The 15th century marked the beginning of the great ...

Indeed, the German goldsmith's 15th-century contribution ... movable type was invented. An important advancement to woodblock printing came in the early eleventh century, when a Chinese peasant ...

The canals beneath Dubrovnik's historic core have existed in their current form since the 15th century and are part ... The most important part of the work was successfully completed.