› added 2 years ago

434

TIL that hippos make their own sunscreen.

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4XMga TIL synthetic shampoos weren't invented until the 1930s, with frequent/daily shampooing only becoming the norm in the 1970s and 1980s.
XkmX TIL that teenagers aren’t stupid in the way they’re noticed. Their brains are smart, making them take more risks than an adult would, helping them gain “useful experience”. This is not done by ignoring risks, but by enhancing the sense of reward, making rewards outweigh risks more in decision making
yQ5gw TIL that a researcher once proposed to his girlfriend in the acknowledgement section of a scientific paper that he published.
6QbY TIL that when played together, the McBain clips from The Simpsons form a coherent mini-movie
L4Om TIL that there is a scientific measurement for the ‘risk of death’ of any action: the micromort. If an activity is rated as one micromort, you would have a one in a million chance of dying while doing it. Running a marathon is ~7 micromorts, sky diving 10, and climbing Mount Everest 40,000!