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TIL that in fall when some tree leaves change color, the brown-red-yellow is actually their real color. The green was the chlorophyll used to absorb sunlight that is now broken down and reabsorbed into the trunk to save energy and reuse for next year's new leaves

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8amRX TIL that, when measuring things for cooking, the volume of a tablespoon is different in the US, the UK and Australia.
oBrZ7 TIL Angkor Wat actually used a much greater amount of stone than every one of the Egyptian pyramids combined. On top of that, if also occupied a surface area greater than Paris in its entirety
Me7AA National Geographic Emerging Explorer Leslie Dewan is helping to revolutionize the nuclear power industry by designing a safer, more efficient alternative to today’s reactors.Conventional nuclear reactors only use about 3 to 4 percent of uranium’s accessible energy. The energy left behind is what makes conventional nuclear waste—radioactive for hundreds of thousands of years—so dangerous. Extracting more of the available energy reduces the radioactive lifetime of the waste. To this end, Dewan is helping to develop techniques that extract 96 percent of the available energy.
6EQmm TIL that in 2008, Tim McLean was beheaded and cannibalised while riding a bus in Canada. The perpetrator, Vince Li, spent seven years in mental hospital, and was released in 2015, to a group home. He was granted a discharge in 2017. One of the first officers on the scene later committed suicide.
yrpa TIL the series Police Squad was cancelled because “the viewer had to watch it in order to appreciate it,” which TV Guide magazine called “the most stupid reason a network ever gave for ending a series.”