It kept its body hunched, and its face was etched like miniature porcelain against the halo of fuzz that gathered at its neck. In Spanish, the pygmy marmoset is called leoncillo, or little lion.

A monkey's uncle may actually be its father, according to a new study showing that germ-cell chimerism is rampant in marmosets. These animals often carry another individual's sperm or egg cells ...

In the video, one rescuer can be seen cradling a tiny baby marmoset, a type of tree monkey native to the region. In the video ...