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TIL Orcas exploit a 'security bug' in great white sharks to immobilize and kill them. When a shark is held upside down this induces tonic immobility (TI), a sort of temporary paralysis; the orca are known to attack them in a way that induces TI and will keep them there till they suffocate.

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0w9Yp TIL that London 2012 organisers approached the band manager of The Who to ask if Keith Moon could play at the Olympics ceremony. Keith Moon passed away in 1978
e0nJ4 TIL in the Netherlands peanut butter is called pindakaas, or "peanut cheese" because of the term "butter" being a protected term for foods that contain butter
e0pmL TIL of the Blue Ocean strategy, wherein companies cease attempting to compete with other companies. The name refers to an ocean that is clear (no competition) as compared to a red ocean: stained with the blood of other companies. The Nintendo Wii is an example of a successful Blue Ocean strategy.
gLBb TIL The British Army considered (and attempted) training seagulls to poo on enemy submarines periscopes before realising that seagulls don’t fly that far out to sea.
vP4rK TIL - There was a girls dance camp nearby when the atomic Trinity test occurred. The girls played in the falling white ash. 10 of the 12 girls died before 40.