We’re living in the Golden Age of bionic body parts. Ear not working? Bam, bionic ear. Joints all fucked up? We’ll just engineer you some new ones. Pretty soon we won’t be burdened with the atrophying ...

For decades, above-the-knee amputees have had to live with stiff, uncomfortable prosthetics that felt more like rigid tools than natural limbs. As a result, climbing stairs, stepping over objects, or ...