You can become younger—you only have to believe it. And that’s easier than you may think. Read the story of this landmark study from almost 40 years ago. Researchers designed a building to reflect the styles and conditions of the year 1959. The building became home to a group of eight men, all over 70 years of age, for five days. The men were told they should not merely discuss this past era while living there, but act is if they actually were their younger selves. By the end of the five days, the men demonstrated noticeable improvement in hearing, eyesight, memory, dexterity, and appetite. Those who had arrived using canes, left the building carrying their own suitcases.