Our planet has been home to more than 100 billion humans so far. We know of just one, Jeanne Calment of France, who ostensibly lived past the age of 120. Most scientists believe she died in 1997 at the age of 122, although it’s also possible that her daughter replaced her to avoid paying taxes.13 Whether or not she actually made it to that age really doesn’t matter; others have come within a few years of that age but most of us, 95 percent to be precise, are dead before 100.
