High-ranking males and females are groomed by those wishing to curry favor; young females groom their mothers; and juveniles both groom and play with each other. Woolly monkeys are polygamous.

The United States Senate delivered a clear reminder of why we should not trust scientists and their cheerleaders last ... produced chimeric human-monkey embryos. The last surviving of the embryos ...

Callitrichids (marmosets and tamarins) also show paternal or sibling care of offspring (single infants to triplets). In owl monkeys, the mother usually provides either dorsal or ventral support ...