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TIL about an Australian jellyfish that causes Irukandji syndrome: excruciating muscle cramps, severe pain in the back and kidneys, a burning sensation of the skin and face, headaches, nausea, restlessness, sweating, vomiting, and psychological phenomena such as the feeling of impending doom.

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4eE5 TIL that the planet Saturn radiates 2.5 times more energy into space than it receives from the Sun.
5VrMB TIL American aboriginals used raccoon penis bones as a pipe cleaning tool
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