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kJeDd TIL Scotland has 421 words for snow. This is because they have words to describe every type of snow, such as steels (to start raining or snowing), feefle (to swirl), and flinkdrinkin (a light snow).
DQnrg TIL although we live in a 3D world, we can only see 2 dimensions. The brain uses information about the difference between the 2 images from each eye to work out the third dimension which is depth.