“When I was a child living on the southern Pacific coast of Costa Rica, my parents would take me to see golden-mantled howler monkeys (Alouatta palliata palliata) in the forest most weekends. Howler ...

A monkey at the top of a tree in Africa seemed to have no way of escaping a leopard that had climbed halfway up the tree and was closing in. But the monkey had a clever plan. The monkey outsmarted the ...