Photo: Monkeys Recognize Poor Grammar



Cotton-top tamarins (above, a cotton-top at the Henry Doorly Zoo in Omaha, Nebraska) can understand at least one advanced grammatical concept, a July 2009 study says.

Researchers found that captive monkeys reacted when they heard a previously learned English word in which the prefix or suffix was put in the wrong place.

Photograph by Michael Nichols/NGS


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