วันพุธที่ 12 กรกฎาคม พ.ศ. 2560

Inventors and their inventions

                             Inventors and their inventions




       Archimedes (287 BCE – c. 212 BCE) Archimedes of Syracuse was an ancient Greek mathematician, physicist, engineer, inventor, and astronomer. Amongst other things he calculated pi and developed the Archimedes screw for lifting up water from mines or wells.  continue reading..



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