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The yo-yo was never really a weapon, that is just hollywood bullshit.
A picture was worth 10,000 words in the original Chinese quote. Blame inflation for that, too.
Silly putty was initially developed when they were trying to make a type of plastic explosive.
I'm sure most people know that, though.
There is more information in a week's worth of the New York Times than the average person encountered throughout his entire life in the 1800s.

During the middle ages, the treadmill was used as a torture device. It all makes sense to me now.
Share useless info here.