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TIL that the UK had just one certified Rectal Teaching Assistant who allowed students to explore his anus. In 2016, he lost his job to a robotic anus after scientists at imperial invented an ultra realistic anus.

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yQ4oM TIL about Hafrún, a 507 year old clam which holds the distinction of being the oldest individual animal ever discovered. In 2006 it was killed by British researchers who didn't realize it's age.
M7Nv7 TIL the curved surface of the habitat at the end of the movie Interstellar i.e. Cooper station is based on O'Neill cylinders in which two cylinders each 20miles long and 5miles in diameter rotate about their longitudinal axis thus providing centrifugal force serving as gravity.
Yp8Nx TIL Pluto was discovered in 1930. It takes around 248 years to complete one orbit around the sun. Since its discovery it still has not even made one complete orbit.
4QXJ TIL that Dogbert from Dilbert was originally going to be called Dildog, but Scott changed the because any printing error that dropped the G would wreak havoc.
6E65m TIL that only female ducks make the quacking sound. Male ducks cannot quack due to anatomical differences.