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TIL: There have been about 514 Leap Years since Caesar created it in 45BC. Without the extra day every 4 years, today would be July 28, 2013.

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8O98 TIL that trees are able to communicate with each other through an underground network known as the ‘wood-wide web’. This system allows trees to loan sugar to neighboring trees, send warning signals about injury or disease, nurture their own offspring, and donate resources to conserve the forest.
oPdL TIL that 17th century astronomer Johannes Kepler, who was unable to publish his dissertation as it contradicted the geocentric model held by the Catholic church, decided to rewrite it as a work of fiction about a man traveling to the moon. It is now considered the first modern science fiction novel.
AKRB TIL that 1 in every 14 people in the US under the age of 50 are estimated to have owned a copy of ‘The Dark Side of The Moon’ by Pink Floyd.
v17eK TIL If Holly (Ilex aquifolium) finds its leaves are being nibbled by deer, it switches genes on to make them spiky when they regrow. So on taller Holly trees, the upper leaves (which are out of reach) have smooth edges, while the lower leaves are prickly
wL1g7 TIL of the National Weight Control Registry, which tracks 6,000 Americans and has shown that calorie control and regular exercise is key to keeping off the pounds, regardless of how much fat you eat.