Many medical authorities predict that average life expectancy could well exceed 100 years by mid century and rise even higher soon thereafter. This astonishing

A NEW YORK TIMES BESTSELLER “Brilliant and enthralling.”​ —The Wall Street Journal A paradigm-shifting book from an acclaimed Harvard Medical School sci

An examination of the ethical issues raised by the possibility of human life extension, including its desirability, unequal access, and the threat of overpopula

“Offers a useful reminder of the role of modern science in fundamentally transforming all of our lives.” —President Barack Obama (on Twitter) “An import