An oddly compelling, often hilarious exploration of the strange lives of our bodies postmortem. For 2,000 years, cadavers--some willingly, some unwittingly--have been involved in science's boldest strides and weirdest undertakings. They've tested France's first guillotines, ridden the NASA Space Shuttle, been crucified in a Parisian laboratory to test the authenticity of the Shroud of Turin, and helped solve the mystery of TWA Flight 800. For every new surgical procedure--from heart transplants to gender reassignment surgery--cadavers have been there alongside surgeons, making history in their quiet way. In this fascinating, ennobling account, Mary Roach visits the good deeds of cadavers over the centuries--from the anatomy labs and human-sourced pharmacies of medieval and nineteenth-century Europe to a human decay research facility in Tennessee, to a plastic surgery practice lab, to a Scandinavian funeral directors' conference on human composting. In her droll, inimitable voice, Roach tells the engrossing story of our bodies when we are no longer with them.