Terry Grossman

Fantastic Voyage: Live Long Enough to Live Forever (Rodale Books, ), published in 2004, is a book authored by Ray Kurzweil and Terry Grossman. The basic premise of the book is that if middle aged people can live long enough, until approximately 120, they will be able to live forever—as humanity overcomes all diseases and old age itself. This might also be considered a break-even scenario where developments made during a year increase life expectancy by more than one year. Biogerontologist Aubrey de Grey called this the "Longevity escape velocity" in a 2005 TED talk.

The book focuses primarily on health topics such as heart disease, cancer, and type 2 diabetes. It promotes lifestyle changes such as a low glycemic index diet,calorie restriction,exercise, drinking green tea and alkalinized water, and other changes to daily living. They also promote aggressive supplementation to make up for nutrient deficiencies they believe are common in Western society. In contrast to his previous book The 10% Solution for a Healthy Life, in which he recommended a diet with 10% of calories from fat, in this book, Kurzweil recommends consuming less than one third of calories from carbohydrates (and less than one sixth of calories in his low-carbohydrate diet) and consuming 25% of calories from fat.