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TIL The famous thumbs up from Vault Boy from Fallout is not just a gesture, but a method of measuring radiation from a nuclear blast.

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0wWZ1 TIL that happy employees are 31% more productive, lead to 37% more sales, and have 3 times the creativity.
J1joB TIL Mastaba, meaning house of stability or house of eternity in Ancient Egyptian, is a type of flat-roofed, rectangular structure constructed out of mudbricks. It was the standard type of tomb in pre-dynastic and early dynastic Egypt for the pharaoh and the social elite, and a precursor to pyramids.
W5Zd TIL that Kwanzaa and Festivus were both made up in 1966
8ewpZ TIL of co-founder Aaron Swartz, who believed in a free Internet when it was still possible. He died by suicide in 2013.
vP0ZK TIL that Georg Elser tried to stop Hitler five years before Stauffenberg