Self-conscious about your age? Careful where you spit. UCLA geneticists now can use saliva to reveal how old you are. The June 22 advance online edition of the Public Library of Science (PLoS) ONE publishes the findings, which offer a myriad of potential applications. A newly patented test based on the research, for example, could offer crime-scene investigators a new forensic tool for pinpointing a suspect’s age.
