“Novak Djokovic, age 35, sometimes hangs out in a pressurized egg to enrich his blood with oxygen and gives pep talks to glasses of water, hoping to purify them with positive thinking before he drinks them. Tom Brady, 45, evangelizes supposedly age-defying supplements, hydration powders and pliability spheres. LeBron James, 38, is said to spend $1.5 million a year on his body to keep Father Time at bay. While most of their contemporaries have retired, all three of these elite athletes remain marvels of fitness. But in the field of modern health science, they’re amateurs compared to Bryan Johnson.” What is Bryan Johnson’s sport? The 45 year-old is racing to be 18 again. Finding out whether that’s possible takes a lot of poking, prodding, testing, and treatment. It sounds a little crazy, but maybe we should thank him. He’s offered himself up as a humanity’s guinea pig, and he’s doing it all on his own dime. Ashlee Vance in Bloomberg/BusinessWeek: How to Be 18 Years Old Again for Only $2 Million a Year. “Getting the program up and running required an investment of several million dollars, including the costs of a medical suite at Johnson’s home in Venice, California. This year, he’s on track to spend at least $2 million on his body. He wants to have the brain, heart, lungs, liver, kidneys, tendons, teeth, skin, hair, bladder, penis and rectum of an 18-year-old.” (I’m not sure I want to spend that much, so I’ve asked the team if I can order some of these items a la carte.)