As The Vigilant Fox reports, reaching 120 and beyond, Musk believes, is simply a matter of "changing the program."

"When you consider the fact that your body is extremely synchronized in its age, the clock must be incredibly obvious. Nobody has an old left arm and a young right arm. Why is that?" Musk said.

He added:

"What's keeping them all in sync? You're pre-programmed to die. And so if you change the program, you will live longer."

However, Musk said he is not interested in immortality:

"One of the worst curses possible would be that you live forever."