This photo is of a skull, mandible and hyoid bone of a red howler monkey, showing the enormous size of the hyoid relative to body size.

Scientists have discovered a nearly complete skull of a ... humanity’s own monkey-like ancestors. A member of the extinct order of Hyaenodonta (which means “hyena teeth”), this fearsome ...

bernensis skull found in 2011 ... And they appear to have had no wisdom teeth, which is rare among primates. It's a mystery how these monkeys got inside the caves all those years ago, but based ...