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Letter to Don Benedetto Castelli  

Gallileo Galilei

An Italian astronomer, physicist, and mathematician, Galileo Galilei (1564–1642) made many significant contributions to science—such as improvements to the telescope and work with ... More

The Mystery of the Harappan Seals  

Thomas R. Trautmann

Few things are more tantalizing to historians than an undeciphered script. Hundreds of broken and intact Harappan seals have been discovered in numerous sites throughout the Indus Valley, ... More

“On Sociability,” The Descent of Man, and Selection in Relation to Sex, 1871  

Charles Darwin

Charles Darwin (1809–1882), a British naturalist, propounded the theory of evolution in his famous work On the Origin of Species (1859). With this theory, Darwin launched a massive debate ... More

The True History of the Conquest of New Spain  

Bernal Díaz del Castillo

The best Spanish source on the Aztec–Spanish encounter was written by Bernal Díaz del Castillo, an old campaigner from Cortés’s army. Born and raised in a poor family in Spain, Díaz began ... More

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