Will nanotechnology spark breakthrough in 20 years? Ray Kurzweil doesn’t tailgate. A man who plans to live forever doesn’t take chances with his health on the highway, or anywhere else. As part of his daily routine, Kurzweil ingests 250 supplements, eight to 10 glasses of alkaline water and 10 cups of green tea. He also periodically tracks 40 to 50 fitness indicators, down to his “tactile sensitivity.” Adjustments are made as needed.

“I do actually fine-tune my programming,” he said. The inventor and computer scientist is serious about his health because if it fails him he might not live long enough to see humanity achieve immortality, a seismic development he predicts in his new book is no more than 20 years away. It’s a blink of an eye in history, but long enough for the 56-year-old Kurzweil to pay close heed to his fitness. He urges others to do the same in Fantastic Voyage: Live Long Enough to Live Forever. The book is partly a health guide so people can live to benefit from a coming explosion in technology he predicts will make infinite life spans possible. […]