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TIL some moth caterpillars make sounds to avoid being eaten or tasted. They are among animals that advertise or signal to potential predators they are not worth attacking through colours, sounds, odours, or other characteristics that warn about being unpalatable or poisonous

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Oom4e Til:The Ringelmann effect is the tendency for individual members of a group to become increasingly less productive as the size of their group increases. As more people are involved in a task, their average performance decreases, each participant tending to feel that their own effort is not critical.
gMX4y TIL during the 2013 Westgate shopping mall attack in Kenya an ex SAS member and former Irish soldier joined forces to rescue victims of the shooting, organised police to attempt a counter attack and evaded gunfire while rescuing people still trapped in the mall
7kXx TIL gold on Earth came from colliding neutron stars
E1G50 TIL that 1 cup (3.5 oz / 100 grams) of raw elderberries contain 3 milligrams of Cyanide - this is 3% of the estimated fatal dose for a 130 pound (60 kg) person. Yet the raw berries are made into syrup and gummies to treat flu and cold symptoms. Theoretically - 7.3 pounds (3,3 kg) can kill you.
b6g77 TIL that in the early 20th Century, Chicken was considered a spring delicacy in the USA, raised seasonally by Farm Wives. Then during WWII, red meat was heavily rationed and Chicken Farming became industrialized. In 1930, average Americans ate 10 lbs of Chicken annually. Now we eat 64 lbs annually.