Surgeons in Madrid seemed to be left with only one option: amputate. But instead, they built the patient a new bone from scratch, using a lattice structure borrowed from spacecraft engineering that the human body now can’t tell apart from its own.

Surgeons in Madrid seemed to be left with only one option: amputate. But instead, they built the patient a new bone from scratch, using a lattice structure borrowed from spacecraft engineering that the human body now can’t tell apart from its own.