The development of primate brains is shaped by various inputs. However, these inputs differ between independent breeders, ...

It was after midnight in Quito when Stella de la Torre came for me, waiting under a streetlamp next to the black minivan that would ferry us to the Amazon, to see the smallest monkey in the world. I ...

The cute creatures are chatty, family oriented—and facing a shrinking habitat in the remote forests of Ecuador A baby pygmy marmoset, under the care of an older member of its cooperative family group, ...