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TIL the "spots" on a giraffe are actually the yellow part

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xV4o5 TIL that North Korea has a population of 25.5 million people. That means its population is slightly larger than Australia’s and it has more people than two thirds of the world’s countries (even after accounting for territories and dependencies listed separately in this data)
XE6XE TIL A fatal dose of caffeine is 113 cups of coffee, but you’d die of water poisoning first.
0doDA TIL that Crested Auklets smell like tangerines and when they mate, other birds in the colony will surround them as vocal spectators and jockey positions to get close.
0dXOA TIL The name Marathon comes from the legend of Philippides. A Greek messenger ran from the Battle of Marathon to Athens without stopping, before collapsing and dying. He ran 26.2 miles, which determines the length of a marathon today
1o4X TIL The earliest form of RAM stored data as sound waves. Bits would be ‘thumped’ into a tube filled with mercury, then read by sensor on the other end. The computer was free to do other things during the relative eternity it took the bits moving at the speed of sound rather than the speed of light.