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TIL: An octopus has blue blood and three hearts

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nWeQG TIL that there is a term related to the art of hotel toilet paper folding called “toilegami”. The reason for this hotel practice: “Hotels want to give their guests…confidence that the bathroom has been cleaned (so) the maid will fold over the last piece of toilet paper. It is subtle but effective”
69B4Z TIL that the top of Mount Chimborazo is farther from the Earth's center than Mount Everest
rR5bM TIL the infamous Great Seattle Fire of 1889 also killed 1 million rats, which completely eliminated the town's major rodent problem
1Mr TIL That the Great Wall of China is also known as “The Longest Cemetary On Earth” because it is filled with bodies of the workers who died during its erection
WgWA TIL that an asthmatic boy died in a severe asthma attack because the school forbid asthma inhalers; while the boy was dying, the inhalers sat in a safe at the principal’s office.