Claudius Ptolemy was a Greek mathematician, astronomer and geographer who lived in the Egyptian city of Alexandria while ...

Gregor Mendel discovered the basic principles of heredity through experiments with pea plants, long before the discovery of ...

Occam’s razor is a principle often attributed to 14th - century friar William of Ockham that says that if you have two ...

String theory is perhaps the most high-profile candidate for what physicists call a theory of everything – a single ...