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TIL In 1945 the only successful international sub to sub rescue mission was carried out by the USS Cod; who evacuated the crew of the Dutch sub O-19, who were stranded on a reef. To commemorate this a symbol was added to Cod's battle flag: the name O-19 under a martini glass.

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6Eje8 TIL our solar system is surrounded by a "ring of fire"🔥 🔥 🔥 an 89,000F wall of plasma created by the interaction between the sun and interstellar winds.
0m91 TIL Lincoln created the Thanksgiving Holiday in 1863 during the Civil War to keep the country together.
yVNoX TIL that the actual heart of Saint Valentine is kept in a golden box in a church in Dublin, Ireland.
GgW7 TIL When charging car battery, connecting positive to negative and negative to positive could result in damage to the alternator or even an explosion.
6E5xm TIL in 1954 Israel tried to create a false flag attack in Egypt by planting bombs in Egyptian, American, and British civilian targets. Muslims were to be blamed in order to convince British troops to stay in the Suez canal. Israel denied any involvement before awarding the agents 51 years later.