"We’re at a key transition in human history,” says Prof Hugh Herr, who heads the Biomechatronics  Group at the famed Massachusetts Institute of Technology (MIT).

He says the group’s aim is to establish the scientific and technological conditions that will eventually eliminate disability, whether through paralysis or amputation.

"We’re transitioning from a relationship where we use technology that is separate from our nervous system, to a new epoch of integration, of human physiology."

But not all the work carried out here is about replacing limbs. It’s also looking at improving them.

One exoskeleton project reduces the physical exertion when walking by 25%, explained researcher Tyler Clites.

He said this future brings a concern that the rich and fortunate of the world may become physically superior, too.

Read more at BBC