
The body is the most complex machine in the world, and the only one for which you cannot get a replacement part from the manufacturer. For centuries, medicine has reached for what's available--sculpting noses from brass, borrowing skin from frogs and hearts from pigs, crafting...

The body is the most complex machine in the world, and the only one for which you cannot get a replacement part from the manufacturer. For centuries, medicine has reached for what's available--sculpting noses from brass, borrowing skin from frogs and hearts from pigs, crafting...

