A recent paper published in the journal Nature claims that the ceiling for earthly existence for human beings is 115. Dr. Jan Vijg from the Albert Einstein College of Medicine and his colleagues examined global demographic data and determined that we are reaching our life span limit. Human life spans have increased through time with medical and technological innovations but, according to Dr. Vijg and his colleagues, that has stagnated since the 1990s. Have we reached the limit? Would you really like to live to see your 150th birthday?