Astronomy
Pioneers of Science
_Physical Science of the Ancients._ Thales 640 B.C., Anaximander 610 B.C., PYTHAGORAS 600 B.C., Anaxagoras 500 B.C., Eudoxus 400 B.C., ARISTOTLE 384 B.C., Aristarchus 300 B.C., ARCHIMEDES 287 B.C., Eratosthenes 276 B.C., HIPPARCHUS 160 B.C., Ptolemy 100 A.D.