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TIL if two identical twins have children with another pair of identical twins, then their children are genetically not half-siblings, but full siblings.

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oRA7R TIL that Bullerby syndrome is a term referring to an idealization of Sweden, which may occur in German-speaking Europe. It consists of a stereotypical image of Sweden, usually with positive associations, including wooden houses, clear lakes, green forests, elk, happy people, and midsummer sunshine.
m1VAM TIL that Z was not actually the last letter to be added to the Alphabet. Its actually J!
eALb TIL People with poor mathematical skills, aren’t necessarily bad at math because they are ‘ungifted’. There is a phenomena called 'Math Anxiety’ that makes people perform worse, which sometimes leads to math avoidance, which leads to lesser knowledge and consequently more Math anxiety.
mxVbo TIL about Dehomag, a German subsidiary of IBM and was the main provider of computing equipment in Nazi Germany. It provided the German government with machines to conduct censuses and gave the Nazis a way of tracing Jews. The technology was used by the Gestapo to locate and arrest its victims.
QNMdL TIL that in 2012 pirates mistook a Spanish warship for a cargo ship and attempted to board it.