The auditory ossicles of the middle ear – the malleus, incus and stapes – are the tiniest bones in the human body. All three can fit on a dime, with room to spare. Their job is to transmit sounds from ...

When it comes to repairing human bodies, there’s one major difficulty: spare parts are hard to come by. It’s simply not possible to buy a knee joint or a new lung off the shelf. At best, doctors and ...