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TIL one of Jupiter's moon, Europa is known to have a huge ocean underneath its icy surface. NASA is developing an ice-penetrating technology called ARCHIMEDES that uses laser light to penetrate Europa's crust and allow explorers to access its underlying ocean.

Read more science.nasa.gov

via reddit.com

1abe4 TIL of Eastern equine encephalitis (EEE), a disease transmitted by mosquitos. A third of cases (2/year) die, and many survivors suffer permanent brain damage. It was first recognized in MA in 1831 when it killed 75 horses.
MPkK TIL that the phrase “to turn a blind eye” comes from British Vice Admiral Nelson, who was blind in one eye; in one battle, when he was signaled to stop attacking a fleet of Danish ships, he held up a telescope to his blind eye, saying “I really do not see the signal,” and attacked anyway
8eQg8 TIL that in 2008, the city of Chicago sold the rights to collect revenue from its parking meters to a foreign-owned company, receiving a sum of $1.2 billion against a 75 year lease. Investors have collected $2.1 billion so far, for a yearly RoR of only 4.3%. Chicago has made a handsome profit.
mxKgY TIL in 1964 a super cyclone destroyed a town called Dhanushkodi, making it into a ghost town. The storm overturned a train entering it's railway station killing over 200 passengers. 4 radio operators braved the storm to continue broadcasting, and survived by clinging on to a bridge for 12 hours.
10oV TIL that for the 2022 World Cup in Qatar, one of the stadiums is being built in the northern district of Ash-Shamal (348 sq. miles), with a population less than 8,000 people. The stadium being built seats 45,330 people.