Atlanta-based author and primatologist Frans de Waal has observed animal behavior for 40 years. He's since challenged prevailing scientific notions of...

Atlanta-based author and primatologist Frans de Waal has observed animal behavior for 40 years. He's since challenged prevailing scientific notions of...

Biologists have studied animal intelligence for years, but primatologist Frans de Waal believes we underestimate exactly how smart they are. He believes...