Millennium BC Chinese invent the sundial. Marcus Tullius Cicero assassinated. February 29 Julius Ceasar establishes the Julian calendar of 365.25 days and institutes leap year. Chinese develop the magnetic compass.
Romans use waterpower to mill grain.
Judea gains independence from Syria. Chinese emperor Shihuang burns writings of dissidents and some dissidents. Construction begins on the Great Wall of China. Shih Huang Ti, first emporer of China, attempts to destroy philosophical texts. Alexander destroys Thebes.