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TIL, you should measure the blood pressure in both of your arms. If there is a large difference, this may signify an increased risk of cardiovascular disease or even death.

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1amrr TIL that in 2005, France passed a law that required teachers to speak about the positive role of French Colonial Empire. It was repealed a year later through the intervention of the Constitutional Council.
QNxpX TIL: That L-8 also known as the "Ghost Blimp", was a United States Navy L-class airship whose two man crew disappeared over the Pacific Ocean on August 16, 1942 and then eventually landed on it's own near San Francisco.
VJMp TIL Olympic Gold Medals are 92.5% silver
wAe8 TIL that in 1963, some Barbie dolls came with a book entitled “How to Lose Weight” which advised “Don’t eat!” and a bathroom scale permanently set at 110 lbs.
WkrB8 TIL that the official title of the Austrian Emperors listed 48 different kingdoms, duchies, principalities, lordships, and counties that were under their rule, and 4 more "etcetera"s