To have your picture taken by the very first camera you would have had to sit still for 8 hours!
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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).
1
The ball on top of a flagpole is called a 'truck'.
24
Kissenger is a pig-shaped robotic device that lets you kiss someone over the internet.
5
The electric chair was invented by a dentist!
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