Scientists in China have built a prototype high-speed maglev train that is theoretically capable of reaching speeds of up to 1,800 mph (2,900 km/h).
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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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Energy is being wasted if a toaster is left plugged in after use.
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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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More than a billion transistors are manufactured every second.
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The first alarm clock could only ring at 4 a.m.
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A small airplane can fly backwards.
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