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TIL chickens have special eyes. the unusual arrangement of cells in a chicken’s eye constitutes the first known biological occurrence of a potentially new state of matter known as “disordered hyperuniformity”

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78e0X TIL that Groundhog Day America was brought to America by German settlers. In the original tradition, a hedgehog was used to predict the weather but was switched to the groundhog which was much easier to come across in the Keystone State.
Bkne TIL the Khmer Rouge’s “Killing Fields” genocide spilled over the border into Communist Vietnam, resulting in the massacre of over 3,000 Vietnamese. Vietnam responded by invading Cambodia and overthrowing the Khmer Rouge.
mx1OY TIL in Germany you can buy a sausage Advent calendar
Y7kl7 TIL that rainbows are actually full circles, and half of the rainbow is always over the horizon.
4XrZw TIL Anne Frank hid some dirty jokes in her diary. One of them reads: "Do you know why the German Wehrmacht girls are in the Netherlands? As mattresses for the soldiers."