Benjamin Franklin (1706-1790),American scientist,inventor and statesman. Franklin showed that lightning is electricity by flying a kite carrying a metal key during a thunderstorm. This led to his invention of the lightning rod to protect buildings from lightning strikes. He also invented fins for swimming,bifocal glasses,a urinary catheter and showed that evaporation cooled objects. In between all this,he also found time to found the USA,help shape the revolution and be a signatory of the Declaration of Independence | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Sutton, Spencer |
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