› added 9 years ago

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TIL If kidney cells didn’t have aquaporins, which allow cells to reclaim water from urine, humans would have to excrete about 180 L of urine per day.

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78Vop TIL that the oldest door in Rome, the Pantheon Gate, is over 2000 years old and weighs over a tone. Despite this, it is very well balanced and can actually be opened by one person.
Y7Dnx TIL that not all male mammals have external testicles. Those mammals with internal testicles don't just include sea mammals, but others such as elephants.
Qmne TIL that in Raiders of the Lost Ark, they limited the onscreen blood from gun shots during the truck chase by using fine red dust instead of liquid fake blood. Unfortunately, the only red dust available for the squibs was Cayenne Pepper, which caused a lot of suffering for the stunt crew.
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ADY6o TIL Sperm whale sonar clicks are so loud they can do physical harm to divers.