TIL in 2016 researchers observed a female orangutan enlist the help of a male to kill another female. This is the first time a female orangutan has been observed killing another female. It's "highly unusual" that the female enlisted the help of only one other individual & also one of a different sex [Source]

TIL Teddy Roosevelt would regularly stage and participate in boxing matches, sometimes with professionals, while in the White House. [Source]

Til the amphibian ark, a program established in 2007 to collect amphibians before they go extinct with the goal of using these collections to stabilize or re-establish wild population facing extinction [Source]

TIL Pluto has not completed a full orbit of the Sun since it was discovered in 1930, and was named by an 11yr old girl. [Source]

TIL that Leonardo DiCaprio improvised the line “I’m the king of the world!” during filming of Titanic , and James Cameron almost cut it from the movie. [Source]

TIL Iran was a secular democracy until the USA and Britain overthrew their government in 1953 for their oil and installed the Shah. [Source]

TIL that in some parts of World War I trench warfare, opposing soldiers informally agreed not to fire at each other during quiet periods, a phenomenon historians call “live and let live.” [Source]

TIL that in 2010, a man in Georgia dislocated his jaw at Which Wich by attempting to eat their Double Wicked Sandwich: it consists of double-portioned beef, bacon, turkey, ham, pepperoni and three cheeses. The man declined to sue them, only wanting a new Double Wicked as his friend ate the original. [Source]

TIL that the first atomic clock, built in 1955, was so accurate it would lose only about one second every 300 years making it more precise than the Earth’s rotation. [Source]

TIL the San Diego Zoo grew out of exotic animal exhibitions abandoned after the 1915 Panama–California Exposition. It was cheaper to leave the animals behind than transport them back to where they came from [Source]

TIL over 40 years researcher Ian Stevenson, M.D, amassed 3000 cases of children aged 2-5 who claimed to remember past lives, recalling specific details like names, locations and events from the previous lives of deceased individuals. [Source]

TIL of Ian Waterman, who was unable to move or even sit up after a rare infection destroyed his sixth sense (proprioception). While he could still compel his muscles to contract, he lost the ability to coordinate his movements, only relearning to move after years of training to use his body. [Source]

TIL that Philo Farnsworth, the man who invented television, only appeared on a TV program one time. In 1957 he appeared on the quiz show I've Got A Secret. His secret was "I invented electronic television", which stumped the panel. For winning he received $80 and a carton of cigarettes. [Source]

TIL the first successful large scale slave rebellion was the Haitian Revolution. Spanning 1791 - 1804 the enslaved Africans of Haiti rebelled against Napoleon's rule, to earn their freedom. It is one of the only slave rebellions that ended in a state free of slavery, and ruled by former slaves [Source]

TIL the Marquis de Lafayette was made a major general in the Continental Army when he came to support the Americans in the Revolutionary War at age 19, despite never holding a rank above Captain in the French army—a rank he received as a wedding present. [Source]

TIL About the bumpy snailfish (Careproctus colliculi), a fish newly discovered off the coast of California [Source]

TIL On 30 December 1999, Beatle George Harrison and his wife, Olivia, were brutally attacked in their home, Friar Park, by an intruder named Michael Abram which resulted in George suffering 40 stab wounds, one narrowly missing his heart. [Source]

TIL that in 2018 there was a diplomatic spat between India and Pakistan due to accusations that diplomats were ringing each other's doorbells at 3.00am, then running away. [Source]

TIL that the last known individual dinosaur was a triceratops that lived as recently as several thousand years before the K–Pg extinction event. No younger dinosaur fossils have yet been found. [Source]

TIL that Julius Yego, who famously taught himself Javelin through the internet, is still competing at the elite level 11 years after his famous World Championship win in 2015. At the 2025 World Championships he made it to the final and placed 6th. [Source]

TIL Richard of Shrewsbury was knighted before 2 years old, married at 4, widowed at 8, then likely murdered at 9. [Source]