Just how long can a human live? Currently, the world’s oldest person is a 118-year-old in Japan. Close to half a million people have lived past 100 years in recent decades. University of Washington researchers recently used statistical modeling to determine potential maximum life spans we could have this century. In their new study published in the journal Demographic Research, they conclude that by the year 2100, there is a 99 percent probability that someone will live to 124. And there is an almost 1 in 7 chance that a person will reach age 130.