› added 10 years ago

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TIL there’s a hypothesis which claims the Cambrian explosion (development of complex organisms, bone, shell) can be explained by the adaptation of organisms to the increase of calcium,iron leaking into the oceans from eroding rock layers

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R7Ll8 TIL Self-driving cars can cruise to avoid paying to park. When you factor in electricity, depreciation, wear and tear and maintenance, cruising costs around 50 cents an hour. This is still cheaper than parking, even in many smaller towns.
e9yD TIL in ancient Rome urine was a taxed commodity due to its value as a cleaning product.
W9WB TIL an artificial Christmas tree would have to be reused for more than 20 years to be “greener” than buying a fresh-cut tree annually
vgyL TIL American pediatrician Saul Krugman deliberately infected thousands of mentally disabled children with Hepatitis B between 1950-1972 to further his research in vaccinology. He was made president of the American Pediatric Society in 1972.
LkBrr TIL we are either left or right eye dominant, just the way we are either left-handed or right-handed. ~70% are right-eyed.