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TIL New York's Woolworth Building was once a household name and the tallest building in the world for 17 years. Even though it is a National Historic Landmark, tourists are not welcome unless they book a tour with the great-granddaughter of the Woolworth Building's architect, Cass Gilbert

07Oy TIL British empire, “the empire on which the sun never sets”, was the largest empire in history. By 1922 it held sway over about 458 million people, one-fifth of the world’s population at the time. The empire covered more than 13,012,000 sq mi, almost a quarter of the Earth’s total land area.
D1Bnr TIL that fruit ripening with ethylene gas started after a leaky gas main caused plants to grow abnormally. Dimitry Neljubow a Russian scientist was able to identify the chemical in 1901.
J1pJm TIL Historians hoped to create a permanent indoor exhibit at Dallas Love Field to commemorate Johnson being sworn in as President there after JFK assassination. Plans came to a mysterious halt before the 50th anniversary in 2013. It is not fully understood why, the director refuses to discuss it
rR7WM TIL of the Antarctic Snow Cruiser, a 55 foot, 37 ton vehicle used in a 1939 Antarctic expedition. Its smooth tires were ill suited for the deep snow but the crew discovered that traction was increased by driving in reverse. They proceeded to complete a 92 mile trek, completely in reverse.
QJnbe TIL that an ancient underwater temple, originally considered a myth, was discovered in India after a deadly Tsunami parted the sea, revealing it's location.