A US scientist has discovered an internal body clock based on DNA that measures the biological age of our tissues and organs. The clock shows that while many healthy tissues age at the same rate as the
By Nona Willis Aronowitz, NBC News contributor More than two decades ago, then-33-year-old Dan Price had a wife, two small children, a high-interest mortgage, and a stressful job as a photojournalist Kentucky.
An ancient network of rivers on Mars once made parts of the planet habitable for microbial life, according to the latest analysis from Nasa's Curiosity rover. Rock dust drilled from sediments in the giant