While modern humans tend to think of science in terms of innovations made during the past 100 to 200 years, mankind has always had great scientific thinkers. Over 2,000 years ago, one or more such ...

The 3.5-foot timepiece, which includes an automaton, is on loan to the Paris museum until November. By Nazanin Lankarani Reporting from Paris Ancient water clocks, the astronomical devices of the ...