The safety pin was invented in just three hours by Walter Hunt in 1849 to pay off a $15 debt.
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The steam engine played a major role in the Industrial Revolution.
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The GIF format is older than the World Wide Web — it was invented in 1987.
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A 'jiffy' is an actual unit of time — 1/100th of a second in computing.
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Service dogs are trained to assist individuals with disabilities.
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The transistor, invented in 1947, made modern computers possible by replacing bulky vacuum tubes.
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The internet connected computers across the world.
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The Eiffel Tower grows about 6 inches taller in summer due to thermal expansion of the iron.
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Satellites can read license plates from orbit under ideal conditions.
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