PHYSICS & MATH

 Divers Found Nazi Enigma Machine in Baltic Sea

Nazi Enigma Machine Found By Divers

The Enigma machine is an encryption device developed and used in the early- to mid-20th century to protect commercial, diplomatic, and military communication.
How To Tell Time Without Using Clocks

How To Tell Time Without Using Clocks

Long before the clock is invented, ancient people have learned various ways of telling the time through available resources. Here are some of those.
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