Ptolemy

While civilized society was just learning to use the wheel on earth, ancient Greeks were aiming at celestial space and the stars.

The exact time, the positions to the stars and planets, and our exact location were known to ancient Greeks as well thanks to the astrolabe.

An exhibition, entitled "The amazing inventions of the ancient Greeks," hosting functional replicas of some of the most inventive ancient Greek creations, will be held at the Herakleidon Museum in Athens from August 1, 2015, to January 10, 2016. Visitors will have...