World's Smallest Monkeys and Chimerism

These are the world's smallest monkeys. The marmosets (22 species are found in Brazil and few in adjacent tropical countries) live in both dry and wet forests. Most of them have a body 25 cm (10 in) long, with a 35 cm (14 in) long tail, while the weight is around 250 grams (0.55 pounds).... [ read more >> ]