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TIL during WW2, Germany experimented with rocket powered submarines. They could reach underwater speeds of 28.1 knots (52.0 km/h; 32.3 mph).

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XEVXD TIL Peter Benchley, the author of "Jaws" regrets writing the book due to it's cultural impact against sharks, and has dedicated his life to oceanic conservation.
NRb1 TIL in the UK and Ireland, one can sign up for an inexpensive, mutually beneficial arrangement for owners who need minders for their dogs, and dogless folk, who love dogs but prefer to love them in a part-time sort of way.
odlE TIL NOT making your bed exposes bed mites to fresh air and light, which dehydrates them. Making your bed traps stale air and moisture under the sheets, providing the perfect environment for bed mites to flourish.
OGJv6 TIL Marvin Gaye was desperate to have Bassist Extraordinaire James Jamerson play on "What's Going On" but Jamerson was too intoxicated to stay upright, so James played the classic line while lying flat on his back.
Z8y4p TIL that under every brown eye is a blue eye. The only difference between a brown eye and a blue eye is a very thin layer of pigment on the surface and that exists a noninvasive cosmetic surgery that transforms brown eyes to blue by low-energy laser