Modern humans have uniquely small and flat faces, especially compared with our Neanderthal cousins' notoriously robust faces ...

Our immediate evolutionary family is comprised of the hominoids, the group of primates that includes the "lesser apes" (siamangs and gibbons) as well as the "great apes" (chimpanzees, bonobos ...

Male chimpanzee embracing and body kissing his close male ally following social tension. Credit: Jake Brooker/Chimfunshi Wildlife Orphanage Trust Two juvenile bonobos embrace at Lola ya Bonobo ...