A  Science and Technology Odyssey In Cyberspace-Time 
20000 BC to 1800 AD
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Title Page

20000BC-301BC

300BC-1499AD

1500 - 1699

1700 - 1800

Back to Timeline 20000 B.C. thru 301 B.C.

Water Clock
(1500 BC)

"Water clocks were among the earliest timekeepers that didn't depend on the observation of celestial bodies. One of the oldest was found in the tomb of Amenhotep I, buried around 1500 B.C. Later named clepsydras ("water thief") by the Greeks, who began using them about 325 B.C., these were stone vessels with sloping sides that allowed water to drip at a nearly constant rate from a small hole near the bottom." from a "Walk Through Time"

Marie Curie's Search for Radium (Science...

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