› added 7 years ago

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TIL that IBM researchers made the first prototype of a credit card using magnetic tape and cardboard. That prototype sold at auction for over $20,000.

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XQaP TIL the US warned Japanese citizens at least 5 days in advance of the bombings of Hiroshima and Nagasaki. They dropped millions of leaflets and issued radio broadcasts urging citizens to flee.
b9xg4 TIL It is a common misconception that we lose most heat from our heads. If you immerse your head in cold water, it adds around 10% to overall heat loss. This is not excessive given that the head accounts for 7-9% of the body's surface area.
DQ5Pg TIL: Humans with Aphakia have the ability to see ultraviolet light.
Ryal TIL it is cheaper for seniors to live on a cruise ship than in a nursing home. The average nursing home is $200 a day, while Princess Cruises charge $135 a day, plus offers better food, daily fresh sheets, swimming pools, shows and entertainment, and the ability to travel anywhere in the world.
X0gl6 TIL that BVD (binocular vision dysfunction) is when your eyes can’t properly see the world as a single image. It can lead to headaches, reading issues, light sensitive, and even ADHD.