Compared with a chimpanzee hand, at left, the human hand, at right, has shorter fingers and palms and a longer, stronger more flexible thumb. That not only allows fine manipulation of tools and ...

Sanz hands us each a surgical mask—to protect the chimp, not us. "Talk about maladaptive behavior," Morgan whispers, with a chuckle. We back off a bit and spend the next several hours with our ...

In terms of speed and movement, chimps have the upper hand. The bite force of chimpanzees is 1,300 PSI, while scientists estimate that our jaws can deliver 162 PSI. A chimpanzee would have a ...

These systems are constantly vying for attention and, biologically, the chimp – the animal instinct we’re born with – has the upper hand. If we let the animal in us rule the roost we’ll ...

It was utterly fascinating to watch. In the first place, the dexterity in chimpanzee hands is amazing. Their hands are so human-like and their process of knowing how to make a tool and use it ...