"It looks like part of an arm," he says. "That means we've found ... is in a region already so famous for its ancient human fossils that it is often referred to as the Cradle of Humankind.

The human body has different parts that help us do things like walk ... You have a head and a neck. You have arms, elbows, hands and fingers. You have a chest and a tummy. You have legs, knees ...

AI-powered prosthetics are advancing but still struggle to fully replicate human hand dexterity and sensory feedback.

The arm uses what are called "soft robotics," which are robotics that use a soft, flexible and lightweight material for the parts ... that was working next to a human in order to be able to ...