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TIL Siamese cats developed crossed eyes naturally to compensate for a genetic flaw in their eye structure where the left retina tilts right and the right retina tilts left. Looking straight ahead, it sees two different images. Crossing its eyes places the retinas in line to see more clearly.

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VM5OG TIL Einstein’s theory of special relativity explains why a star can burn for billions of years without running out of fuel. If you can measure potential energy by multiplying mass by the speed of light squared, that means an average adult stores 30 large hydrogen bomb explosions worth of energy.
6m8 TIL that the former CEO and owner of Segway died from Segwaying off a cliff.
Ree9 TIL The tarantula hawk stings and paralyzes a tarantula, drags the specimen to a brooding nest, and lays a single egg on the spider’s abdomen. The wasp larva hatches, creates a hole in the spider’s abdomen, and enters to feed, avoiding vital organs for as long as possible to keep the spider alive.
yQbkJ TIL Of Robert Campbell, a World War One soldier who was a German prisoner, he learned that his mother was dying, and wrote to the Kaiser, asking to be released. His request was granted, with the condition that he had to return. Campbell spent a week with his mother, then returned.
69A17 TIL tone deafness is not the genetic opposite of having perfect pitch