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TIL It would take over 5 and a half days travelling at the speed of light to reach the outer limits of our solar system.

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VMdRp TIL a Cornell University study found that social media "Likes" are less likely to affect the self-esteem of people with a sense of purpose (defined as ongoing motivation that is self-directed, oriented toward the future and beneficial to others).
Me1oB TIL that malaria was once used to treat syphilis. Dr. Wagner von Jauregg injected sufferers with malaria-infected blood, causing an extremely high fever that would ultimately kill the disease. Jauregg won the Nobel Prize for the treatment and it remained in use until the development of penicillin.
N7ZyJ TIL of the 250 plutonium-powered pacemakers Medtronic manufactured, 22 were still in service more than 25 years later, a feat that no battery-powered pacemaker could achieve
KOYNJ TIL cousin Fuller in "Home Alone" is played by Macaulay Culkin's real life brother Kieran Culkin.
Y9Xv TIL that the weird white spots you see when you look up at the blue sky are actually white blood cells moving through blood vessels in your retina.