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TIL an aerodynamic wind tunnel was installed at the base of the Eiffel tower in 1909. The tunnel was used to carryout out thousands of tests, including those on Wright Brothers airplanes and Porsche automobiles. The tower had a laboratory used by scientists to study meteorology, physiology.

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VMAvm TIL The deepest ocean sinkhole in the world is in the South China Sea and is named the Dragon Hole, or Longdong. It is roughly 987 feet deep. Below 328 feet, the hole is devoid of oxygen, and deadly to marine life.
PVnJ TIL that there is a lightbulb that has been burning since 1901
KOgWJ TIL that Frankie Muniz has suffered two strokes, has suffered significant memory loss, including losing memories from his childhood acting days.
ANo5d TIL that taller individuals, due to having more cells in their bodies, are more prone to certain types of cancer.
698W7 TIL going to the beach and swimming in the ocean for leisure is a relatively modern practice in the western world. Prior to the 17th century, Europeans historically viewed beaches as frightening places, and "only peasants sought refuge from the heat in the cool seawater".