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TIL bees make honey by continuously regurgitating nectar into each other’s mouths in order to break down the sugars by partially going through the digestive process each time.

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oBJ4K TIL there’s a stinging plant called the Gympie Gympie that produces a toxin so painful it’s driven humans and animals to suicide. Described as being sprayed with hot acid whilst being electrocuted at the same time. A man was reported to have shot himself after using a leaf as toilet paper.
D1vjp TIL That many larger mammals, like blue whales and elephants, rarely die from cancer - Referred to as Peto's Paradox - Academic sources in video description
mPYx TIL that Botox is the most poisonous substance known to man. A couple of teaspoons would be enough to kill everyone in the UK. A couple of kilos would kill every human on earth.
E1abW TIL that the Soviet Union loved Bollywood films. The values of Indian society and the USSR were very similar and the socialist country enjoyed the common rags to riches narrative. In fact, the highest grossing film of the Soviet Era was a 1982 Bollywood film called Disco Dancer.
KYA9a TIL that in 1963 the Australian Army conducted "Operation Blowdown", in which 50 tons of TNT was detonated to simulate the effects of a nuclear weapon on a tropical rainforest.