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...
The first quantity that people could measure
The first quantity that people could measure with any degree of accuracy, and on which all people could...
Mathematical knowledge of the ancient world
Because baked clay tablets with cuneiform symbols impressed are easily preserved, especially in a dry climate, much is known...
Background
Before establishing the colonies of Jamestown and Plymouth,the English had an attempt to establish a colony on Roanoke Island.They hoped it would be the...
