Alcibiades

Alcibiades (450?–404 B.C.), an Athenian general and statesman. His unprincipled leadership helped cause the defeat of Athens in the Peloponnesian War (431–404 B.C.).

Archimedes

Archimedes, (287?–212 B.C.), a Greek mathematician and physicist. He was the greatest mathematician of ancient times and ranks as one of the great scientists of all times.

Aristarchus of Samos

Aristarchus of Samos, (310?–250? B.C.), a Greek astronomer, believed to have worked in Alexandria, Egypt.

Eratosthenes

Eratosthenes (276–196 B.C.), a Greek geographer and astronomer. He was the first to determine the circumference of the earth.

Euclid of Alexandria

Euclid of Alexandria a Greek mathematician who lived about 300 B.C. He is called the Father of Geometry.

Hero

Hero, or Heron, of Alexandria, a Greek engineer and mathematician of the first, second, or third century A.D.

Pythagoras

Pythagoras, a Greek mathematician and philosopher who lived in the sixth century B.C., and gave his name to a body of facts and theories.