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TIL that "Hark, the Herald Angels Sing" was never meant to be a Christmas carol. The music was originally written for the 400th anniversary of the printing press.

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A9Rw TIL there was a vinyl record format that could play videos: the Capacitance Electronic Disc.
Aj9w TIL a man once made his own chicken sandwich completely from scratch - He grew his own crops, slaughtered a chicken and boiled ocean saltwater for sea salt. In the end it cost him over $1000 and half a year. He didn’t like the taste.
JopV TIL one of the leaders of the Human Genome Project teaches a free, online MIT course of introductiry biological titled: The Secret of Life
dDV4B [TIL] There is no evidence that the historical Caesar spoke Et tu, Brute? as his last words
e0lXJ TIL that the red liquid seeping out of a cooked rare steak isn’t blood. It is in fact a mixture of a protein called ‘Myoglobin’ and water. Myoglobin helps muscle tissue store oxygen and just like Hemoglobin, contains iron that turns red when it binds with oxygen.