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TIL To Catch a Predator was cancelled because a Texas District Attorney committed suicide after being caught exchanging photos with an underage boy.

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e08ED TIL that the largest battle of WW2 was known as the Rzhev Meat Grinder (Ржевская мясорубка), led to about 3 million casualties, but has been largely forgotten as it was inconclusive for both sides and overshadowed by Stalingrad.
e0Q5k TIL any Canadian with a physical or mental disability who qualifies for the disability tax credit (DTC) is eligible for a registered disability savings plan (RDSP) and up to $90,000 in lifetime government grants.
Br05D TIL about Fort Jefferson, abandoned since 1906, a huge hexagonal fort occupying nearly an entire island in the Dry Tortugas off Florida; though never finished, it is the largest brick masonry structure in the Americas.
OoZXg TIL that feeding silkworm larvae mulberry leaves sprayed with fabric dye results in the dye being transported along the biochemical pathways of the silkworm to produce a colored cocoon and colored silk fibre.
Z845v TIL that in 2008, fossilized ink sacs we recovered from preserved remains of Belemnotheutis cephalopods. Mixed with ammonia solution, the team was able to return the ink to its liquid form and used the ~150 million year old ink to draw a replica of of the original illustration of Belemnotheutis.