If you love Ask Science, you'll love this excerpt from The Age of Resilience, a new interpretation of the history of civilization and a transformative vision of how our species will thrive on an unpredictable Earth.

Enjoy this excerpt from Paul Craddock's "Spare Parts." It offers an original look at the history of medicine itself through the rich, compelling, and delightfully macabre story of transplant surgery from ancient times to the present day.