Prosthetic leg can 'change gears' to make going up stairs easier

A robotic leg with a big toe and motors that can "change gear" like a bicycle can enable a wearer to walk up stairs and slopes

Prosthetic leg can 'change gears' to make going up stairs easier
A robotic leg with a big toe and motors that can "change gear" like a bicycle can enable a wearer to walk up stairs and slopes