› added 7 years ago

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TIL of BEEcosystem, a company that let's you install a beehive in your living room to help declining bee populations.

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EgepV TIL that early semiconductors, before CAD, were made by hand drawing the circuit design on graph paper at an extremely enlarged scale, then cutting that design onto a film called Rubylith, which was used to create the final photolithographic mask. Repeat for all layers on a chip.
p8nyN TIL Asbestos was never fully banned in the United States.
mxneY TIL Max Schmeling, world heavyweight champion associated with Nazi Germany, risked his life to save two Jewish children in 1938. Later in life, he financially assisted his one-time bitter rival Joe Louis. The Rocky/Ivan Drago match was based on Schmeling and Louis' fight, but updated for Cold War.
VW4k TIL Playboy magazine is available in braille.
69oRX TIL there has never been a US president who was an only child. On average, the US presidents have had (a little over) five siblings.