Ending Aging: The Rejuvenation Breakthroughs that Could Reverse Human Aging in Our Lifetime is a 2007 book written by Aubrey de Grey, a biomedical gerontologist, with his research assistant Michael Rae. Ending Aging describes de Grey's proposal for eliminating aging as a cause of debilitation and death in humans, and restoring the body to an indefinitely youthful state, a project plan that he calls the "Strategies for Engineered Negligible Senescence", or "SENS".