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TIL there only three species in the animal kingdom that have sex for pleasure: humans, dolphins and bonobo chimps

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GAAmQ TIL The first true bicycle with pedals, invented in 1869, was known as 'The Boneshaker' due to the extremely uncomfortable ride caused by the stiff wrought-iron frame, wooden wheels, and tyres made of iron.
1adv4 TIL Iguanas can voluntarily stop their hearts for up to 45 minutes to avoid sonic detection by sharks.
APlg TIL that there are more Lego bricks on Earth (560 billion) than there are stars in the Milky Way (300 billion)
pYBXG TIL Pandalid shrimp are a rare example of hermaphroditic animals. These shrimp are born male only to eventually become female later in life.
j6A4j TIL that Harry Houdini was also an actor and appeared in one of the first films depicting a powered exoskeleton.