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TIL A 2009 study found that the risk of sudden death during a marathon is 0.8 per 100,000 people, and that triathlons have a significantly higher risk of sudden death at 1.5 in 100,000.

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N7K9e TIL that the Orlov diamond was stolen from the Srirangam temple in India by a French soldier, who sold it to a merchant who smuggled it to Amsterdam, from where it was bought by Count Grigory Orlov, who gifted it to Catherine the Great. She encrusted the diamond into the Imperial Sceptre in 1774.
YWpA TIL a flawed calculation led to inappropriately high social security benefits for those born between 1910 and 1916. The calculation has been fixed, but they still receive these benefits.
a8AWb TIL Rubies and Sapphire are Gem Varieties of the Same Mineral Corundum.
VOEB TIL when skydiver Joan Murray’s parachute failed, she approached the ground at 80 miles (128km) per hour, landing on a mound of fire ants. The shock from being stung over 200 times by the ants released a surge of adrenaline which kept her heart beating, and allowed her to survive.
Eeoo TIL: A new ‘Bionic’ lens can give people eyesight up to three times better than 20/20.