In bewildering new footage shared on YouTube a capuchin monkey, the size of a house-cat, is videoed with a baby howler monkey clinging to its back. Neither monkey are related, nor even of the ...

By Liz Kimbrough Deep in the rainforest, the monkeys are yodeling. Their wild calls echo across the foliage, sending signals ...

Their deep, gruff voices echo through the jungle to find other monkey groups. They communicate to avoid territorial disputes.