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Reindeer antlers grow again each year under a layer of fur called velvet. This reindeer is losing th
Lampreys (sometimes also called lamprey eels) are a family of jawless fish
Photograph of an occupational therapist assisting a patient with learning independence in activities
Cataract extraction. The procedure involves a surgical removal of a cataract lens and its replacemen
Wild chimpanzees make and use simple tools to obtain food, learning tool making from one another.
The neural pathway responsible for the production and learning of song in the male canary.