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TIL the monarch butterfly population has declined 85% in two decades. The western population has suffered a 99% decline. Monarchs are threatened by pesticides — including toxic neonicotinoids and herbicides, which are killing off the milkweed plants they need to survive.

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via reddit.com

N7V1E TIL in 2003 unknown Russian mathematician Grigori Perelman proved the long awaited Poincaré conjecture publishing it openly. He is the only person to reject Fields Medal, Clay Millennium prize of $1,000,000 and EMS prize. He has since vanished back to obscurity.
kOm95 TIL that veterinarians kill themselves at rates 2.5 to 3.5 times the general population, due in part to online trolling and threats from pet owners who blame them for the death of a pet, and easy access to lethal medicines
VMwvm TIL the richest preacher in the world is David Oyedepo of Nigeria, with a net worth of $150 Million. The 63-year old pastor owns 2 private jets, a $10 million house, and controls churches in 45 African nations.
e0AK4 TIL the United States military when trying to avoid divulging information gives reporters briefings with 25 minutes of intentionally dull PowerPoint presentations and 5 minutes left at the end for questions from anyone who is still awake. The presentations are called hypnotizing chickens.
VM4Q8 TIL that even though Philo Farnsworth, the inventor of electronic television, was disappointed by it for most of his life, he changed his mind the day he saw Neil Armstrong walk on the Moon thanks to his invention, telling his wife "this has made it all worthwhile".