Knee replacements can ease people’s pain - but they are also often prohibitively expensive.
Dragana Gordic/Shutterstock
As the world’s population ages, cheap, durable and safe artificial limbs will become ever more important.
A high-tech prosthesis for a child draws on decades of research.
Mark Geil
Devices created for service members and veterans also help civilian children, elderly people and young adults maximize their mobility.
A long time ago, in an empire far, far away …