"TIL when the Daughters of the American Revolution (DAR) denied permission to Marian Anderson for a concert at Constitution Hall under a "white performers-only", First Eleanor Roosevelt resigned from the DAR and arranged for Anderson to perform before an integrated crowd of more than 75,000 people."

"TIL about environmental activist Julia “Butterfly” Hill who lived in a 1500 year old California redwood tree (known as Luna) 180 feet (55 mm) off the ground for 738 days in order to prevent it from being chopped down by Pacific Lumber Company. She successfully saved the tree."

"TIL that Javier Bardem's performance as Anton Chigurh in 'No Country for Old Men' was named the 'Most Realistic Depiction of a Psychopath' by an independent group of psychologists in the 'Journal of Forensic Sciences'."

"TIL GM recalled 800k cars in 2014 for faulty ignitions. The cars would shut off while being driven which meant drivers lost power steering/brakes, and the airbags wouldn't deploy. They knew about the problem since 2005 but never fixed it because it would be 'too expensive'. 124 people died."

"TIL that people with dementia think that stuff like a black doormat isn’t a doormat, but a deep hole in the floor. Due to these visual perception problems, people with dementia avoid stepping the doormat, and this is sometimes used to keep them from leaving their care facilites."

"TIL that “Baby, It’s Cold Outside” was written by composer Frank Loesser in 1944 for he and his wife to sing at the end of their housewarming party as a way to tell guests it was time to leave. Afterwards, they were invited to tons of parties with the expectation of the song being the closing act."

"TIL When Neil Armstrong first stepped on the moon, inside his pocket was a small piece of fabric from the 1903 Wright Flyer"

"TIL: A camel after standing in 109 F (43 C) heat all day decapitated his absent-minded owner after he remembered to untie him."

"TIL in 1997 a Danish woman visiting New York City was arrested and strip-searched for leaving her baby in a stroller outside a restaurant while she and the baby's father dined inside, a common practice in Denmark. She later sued the city and was awarded $66,000."

"TIL of the Deep Lake Water Cooling System (DLWC), a natural cooling system that extracts cold water from deep within Lake Ontario, and then transfers it through a system of pipes and exchanges to cool downtown Toronto. Compared to a traditional air conditioning system, it uses up 75% less energy"

"TIL Isaac Asimov wrote or edited more than 500 books, 380 short stories and an estimated 90,000 letters and postcards. He was a professor of biochemistry at Boston University. He had a triple bypass in 1983 during which got HIV from a blood transfusion which was kept secret 'til 10 years after death"

"TIL Jurassic Park was meant to use stop motion instead of CGI, but two artists worked on a CGI T-Rex in secret, and once they finished it, they quietly put a video of it on screen when Kathleen Kennedy visited their office. the video convinced Kennedy, Spielberg, and the rest of the team to use CGI."

"TIL The prototype of the Rolls Royce Ghost was so quiet inside that it made test drivers sick. The engineers had to remove some of the noise isolating material, and create seats that vibrated at specific frequencies to introduce some noise into the interior."

"TIL the nurse,Caroline Hampton, helped popularize surgical gloves. She almost quit her job as a surgical nurse at John Hopkins due to severe hand eczema caused by surgical disinfectant until her boss bought her custom rubber gloves. Other staff members copied this and found they made work easier."

"TIL that nature has evolved different species into crabs at least five separate times - a phenomenon known as Carcinisation"

"TIL Ian Fleming originally wanted Bond to be an extremely dull, uninteresting man to whom things happened. He chose James Bond because it was the dullest name he had ever heard."

"TIL of Daniel Kish. Blind since the age of 13 months old, he taught himself to navigate by clicking his tongue and listening for echoes, similar to echolocation in bats. Kish and other researchers believe that echolocation produces images similar to sight."

"TIL if a camel rejects her new-born or there's a need to adopt an orphaned calf, Mongol herders use a chanting ritual accompanied by fiddle or flute to coax her into accepting the calf. The camel mother may act aggressive initially, so the herders will change the melody depending on her behavior"

"TIL Andromeda galaxy has already started merging with our Milky Way"

"TIL a cancer treatment known as Dynamic Phototherapy has the side effect of giving humans a slight level of night vision. Under this treatment, the retina becomes able to process light at wavelengths higher than the visible light domain."

"TIL Boris Mikhailov, captain of the USSR hockey team, was offered a $1 million contract to leave Russia in 1980 after the Miracle on Ice. However, he declined as the KGB was standing next to him when the offer was made."

"TIL a park ranger sat down in his office on Rinca Island and was attacked by a Komodo dragon hiding under his desk. The cleaner had the left the door open the night before. The smell of blood attracted more dragons outside. The ranger was taken to the hospital and survived but he has nightmares."

"TIL A woman put over a million miles on her Hyundai Elantra and was given a special badge and a brand new car"

"TIL that the name George has the same root word as Geography and Geology, and means "Earth worker" or farmer."

"TIL studies show the reason why we "click" with certain people is due to people's brain waves being sync in wavelengths called the alpha–mu band, or what scientists call brain-to-brain coupling, and mirror each other neurologically in terms of what they are focusing on."

"TIL that the violin that was played as the Titanic sunk was rediscovered in an attic and auctioned off for $1.6 million in 2013."