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146

TIL that pirates and sailors wore eye patches not necessarily to cover a missing eye, but also to keep one eye dark-adapted for work below decks.

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pgm8 TIL that the pitch of a hyena’s laugh/giggle reveals its age, while variations in the frequency of notes can encode information about dominant and subordinate status.
gMMZX TIL that the invention of Wifi involved a failed experiment by Australian scientists to detect exploding mini black holes the size of an atomic particle.
d8oaj TIL that even though seed-bearing plants evolved ~360 million years ago, all plants that bare flowers or fruits have only existed for the past ~140 million years. Before seeds, plants used to reproduce through spores. The only living ancestors of these plants are ferns, horsetails, lycophytes.
epgKk TIL "Kilroy Was Here" is hidden twice at the National World War II Memorial in Washington, D.C.
neoQb TIL part of what makes Impposible Foods meatless burgers tastes like meat because they genetically modified yeast to produce the plant version of hemoglobin, Leghemoglobin.