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TIL a device called the "Lollipop Star" plays music through your teeth. It uses bone conduction to send sound vibrations through your jawbone directly to your inner ear while you eat the candy, making the music "tasteable" through vibration.

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via reddit.com

R5LDQ TIL that the upon learning of JFK's death, the crew members of Air Force One removed four seats from the aircraft and a portion of the bulkhead in order to accommodate for JFK's casket as they simply refused to put the 'President's body in the cargo hold'.
JYZ41 TIL Blood Donors Aren’t Getting Paid, But Their Blood Is Being Sold. Blood is sold to hospitals, biomedical companies, academic centers, and pharmaceutical companies.
QNA86 TIL that in 1961, 90% of doctors surveyed said they would not tell a cancer patient their diagnosis, but by 1977 that had reversed, with 97% saying they would.
rNRdW TIL that your pupils dilate and constrict if you just think about things that are bright and dark, rather than see light. They also change size in response to arousal and effort, and pupil size could determine if someone has aphantasia.
JYArm TIL the oldest monument in Paris is over 3,000 years old. The Ottoman ruler of Egypt gave a 75 ft, 250 ton ancient Egyptian obelisk to France in exchange for a mechanical clock in 1833. The obelisk was placed in the center of the Place de la Concorde where it stands today.