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Ultra-endurance bicycle racer Lael Wilcox puts more miles on her bike every year than most people do on their cars. Here's how she trains for and rides some of the toughest races on earth.

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jNLNv TIL that horses' hoof keep growing long if not trimmed/cut
BrEjD TIL that the highest absolute altitude ever achieved by a helicopter (12,440 m) resulted in the engines experiencing a flameout at peak altitude. The pilot then set the record for the longest autorotation used for the unpowered landing of a helicopter.
0wpON TIL the September 11 terror attacks on the WTC released a dust cloud of toxic asbestos fibers across Manhattan, with an estimated 410,000 people exposed. It is believed lung cancer and mesothelioma cases in the city will reach a peak in the year 2041 (four decades after 9/11)
E5k0 TIL Elvis was a natural blonde. He started to dye his hair at a young age to have an edgier look.
aYyA TIL after an American Idol contestant was rejected by the judges, he told them to “Be careful” (a common way of saying “Farewell” in Louisville ). The judges bristled immediately and took the comment as a threat.