Leonardo da Vinci was dyslexic, and he often wrote backwards.
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The Canadian province of New Brunswick (which was part of the UK at the time) had a bloodless war with the US state of Maine in 1839
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The World Trade Center towers used to have two zip codes, 10047-10048, one for each building.
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Tickling was a form of torture used in ancient China on nobility because it left no mark and recovery was quick.
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Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
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Hundreds of years ago, the Aztecs of Mexico and the people of Nicaragua believed gods lived in volcanoes. They would sacrifice beautiful young girls to these powerful gods.
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Leonardo Da Vinci made a robotic lion in 1515 that would walk, sway, open its mouth and move its tail - it even had a compartment that opened to present flowers.
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The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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