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TIL the First Aid Kit was invented for railroad surgeons who needed sterile equipment to treat their construction workers.

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p8y9A TIL Roman salt-making entailed boiling the seawater in large lead-lined pans. Salt was used as currency in ancient Rome, and the roots of the words "soldier" and "salary" can be traced to Latin words related to giving or receiving salt.
VMGK8 TIL the FBI has struggled to hire hackers because of the FBI hiring rule that the applicant must not have used marijuana during the last 3 years.
rR1yW TIL In early 17th century London, there was a gay brothel on the site where Buckingham Palace is today.
wp6Y TIL Carl Sagan has a number named after him. Sagan’s number is approximately 300 sextellion and refers to the number of stars in the universe.
p8lVG TIL Astronauts report blurred vision in low-gravity environments as one of the strangest effects of spaceflight on the human body.