When Elon Musk was at Davos last week, an interviewer asked him if he thought aging could be reversed. Musk said he hasn't put much time into the problem but suspects it is very solvable" and that when scientists discover why we age, it's going to be something obvious." Not long after, the Harvard professor...

This is today's edition ofThe Download,our weekday newsletter that provides a daily dose of what's going on in the world of technology. The first human test of a rejuvenation method will begin shortly" Life Biosciences, a small Boston startup founded by Harvard professor and life-extension evangelist David Sinclair, has won FDA approval to proceed with...