The fountain of youth may be made of air, not water. Scientists say they’ve successfully reversed the aging process of elderly people through “oxygen therapy” in a first-of-its-kind study. Researchers from Tel Aviv University used hyperbaric oxygen chambers to target specific cells and DNA linked to shorter lifespans — and found the “Holy Grail” of staying young, according to a press release about the discovery. During the study, researchers investigated whether the therapy — which involves breathing pure oxygen in a pressurized environment — could reverse the effects of aging in 35 people over age 64, according to the study,...