The life boat was patented in 1845!
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An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
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Thomas Alva Edison patented almost 1,300 inventions in his lifetime!
144
A toaster uses almost half as much energy as a full-sized oven.
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The electric chair was invented by a dentist!
122
The normal static electricty shock that zaps your finger when you touch a doorknob is usually between 10,000 and 30,000 volts!
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In the early 1960's, Porsche commercially manufactured farm tractors.
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Scientists in the UK are creating a smartphone app that will enable users to test for STDs.
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