The language of Old World monkeys, some of our primate cousins, may be more sophisticated than previously realized. Even so, it displays constraints that reinforce the singularity of human language, ...

CAMBRIDGE, Mass. - The utterances of Old World monkeys, some of our primate cousins, may be more sophisticated than previously realized -- but even so, they display constraints that reinforce the ...

While other primates have exhibited simple vocabularies, it has long been believed that syntax, the construction of sentences, was unique to humans. But a recent study suggests that at least one ...