› added 9 years ago

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TIL of the Shadow Biosphere. A hypothesis proposing the existence of lifeforms undetected by standard methods. One such being the continuation of the RNA World

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xMQ5 TIL Amazon CEO Jeff Bezos still drives his 1996 Honda Accord. That model today costs around $4000.
Me0Ym TIL that the Mary in "Mary Had a Little Lamb" was a real person. Her name was Mary Sawyer, and she brought a lamb to her school, where it was seen by John Roulstone, who wrote the basis for the nursery rhyme.
R7O7Q TIL The moon was created in a huge planetary collision 4.5 billion years ago. It was initially 22,000 km away, and an Earth day was 5 hours long. Due to tidal action, the moon has gradually moved away to 400,000 km, and slowed the Earth's spin to a 24 hour day.
6EQeQ Matter tells space how to curve, and curved space tells matter how to move. That's the basic principle behind Einstein's General Relativity, which linked, for the first time, the phenomenon of gravity with that of spacetime and relativity. Place a mass down anywhere in the Universe, and the space around it will curve in response. But if you take that mass away, or move it elsewhere, what causes the spacetime to "snap back" to its unbent position?
P1JvV TIL hedgehogs can suffer from balloon syndrome, causing the animal to inflate. The condition is unique to hedgehogs because their skin is baggy enough to curl up