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TIL Our Sun can make a total of 80 different elements: helium and then everything from carbon through polonium, but nothing heavier. For that, you need a supernova or a neutron star collision. Of all the types of naturally occurring elements here on Earth, the Sun can make about 90% of them.

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W7VaN TIL that “Stars and Stripes Forever” is an emergency alert at the circus. When it is played by the band it usually means there is a fire and that the performers and circus hands should go to their emergency stations and start evacuating people
nen7B TIL Railway employees in Japan use a system called “Pointing and Calling” to reduce mistakes. This involves pointing at a sign or signal and calling out the status. Though it may look silly, making these gestures and saying the status maintains focus and attention, greatly reducing workplace errors.
XExrE TIL in military justice, the charge of "Conduct Unbecoming" is actually shortened from its full title, "Conduct Unbecoming An Officer & A Gentleman"
a8vab TIL Rockall is an uninhabited islet in the United Kingdom's exclusive economic zone (EEC). In 1997 the British recognized Rockall wasn't an island and gave up all EEC claims it could have made, Rockall is the only case of a state voluntarily downgrading an insular feature to "a rock".
g057 TIL that the name of the KA-BAR knife, used by the US Marines and Navy, originated from a trapper’s illegible writing after claiming he used the knife to “kill a bear” in 1923.