Environment
Squirrel monkeys teach themselves to eat and drink from a cup
Tool use seemed so rare in squirrel monkeys that they were considered incapable of such feats, now they've been seen carrying food and water in containers
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Tool use seemed so rare in squirrel monkeys that they were considered incapable of such feats, now they've been seen carrying food and water in containers
The unique positioning of our eyes within our skulls may have played a part in our early evolution