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TIL Mosquitoes are attracted to the scent of our body. As such, mosquito repellents evaporate on the skin and work by blocking a mosquito's sense of smell, preventing it from finding its target.

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R5jlw TIL a species of frog in the vicinity of the Chernobyl nuclear plant has changed colour from green to black
VMRJ8 TIL that armadillos can cross streams or rivers either by inflating their intestines to float or by simply holding their breath and walking across the bottom.
woERP TIL since 2000, the Clay Mathematics Institute is offering a prize of 1 million dollars to the person that can prove the Riemann Hypothesis. No one has been able to prove it since it was formulated by Bernhard Riemann in 1860.
Mbxm TIL in 1987 a robbery suspect in Sacramento fled into a darkened movie theater to escape police. He became so engrossed in the movie, Robocop, that he failed to notice that police had evacuated all other patrons from the theatre. When the lights flipped on, the stunned man was taken into custody.
gM80W TIL that Isaac Newton’s dog knocked over a candle and set fire to 20 years worth of research