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TIL 50 to 85 percent of oxygen on Earth comes from the ocean, mainly from phytoplankton.

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LQl49 TIL it's dangerous to bathe during a thunderstorm
alrZ TIL miso soup combats the harmful effects of radiation exposure
rNAr4 TIL Techniques in astronomy of taking images of the sky are being used by dermatologists to monitor melanoma in high-risk patient who have their full body photographed. A patient’s skin is treated like the background sky in an astronomical image, and any moles are treated as stars
rRO00 TIL strong odors, such as cologne and perfume, may cause a person's blood vessels to swell and dilate and, in turn, stimulate the nerve system in the brain associated with head pain causing headaches and migraines.
1X0V TIL that Jack Gleeson, the actor who portrayed King Joffrey in Game of Thrones, has retired from acting to pursue an academic career.