Biological and cultural roots of the Native Americans
Dental morphology, genetics, and archaeology show that the biological and cultural roots of the Native Americans lie...
X. The Portuguese Empire
The Portuguese Empire , also known as the Portuguese Overseas, was one of the largest and longest-lived empires in world history and...
The Archimedean screw
While in Egypt, Archimedes invented the device that is mostly closely associated with him by
name, the Archimedean screw. This is a helix...
Typography was invented twice: once in China and Korea and in medieval Europe. In China, printing was invented, according to some data (Julien, "Documents...
