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TIL: Only 2% of the world’s population have natural green eyes

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gM1Ry TIL In an experiment, students who used laptops had substantially worse understanding of the lecture than those who did not. The researchers hypothesized the lecturer’s words flowed right to the students’ fast typing fingers without processing in their brains
wL8n6 TIL that 70% alcohol is better at disinfecting surfaces than 91% alcohol. In one experiment, a 50% alcohol solution killed Staphylococcus Aureus in less than 10 seconds, but a 90% solution failed to kill it even after two hours of contact time.
6Egr7 TIL in 1997, a physics student demonstrating the Leidenfrost effect by holding liquid nitrogen in his mouth accidentally swallowed the substance, resulting in near-fatal injuries. This was the first case in medical literature of liquid nitrogen ingestion
w7Ao TIL The episode “Heart of Ice,” from Batman: The Animated Series, won an Emmy award for Outstanding Writing in an Animated Program. It was the series’ second Emmy award (out of the 4 that it won).
lar TIL that the Department of Justice doesn’t count mixed race (half-black half-white) prisoners in their racial drug-related incarceration data