You get older every day. But how old are your cells and organs, really? Understanding that could help us live longer, healthier lives, many longevity experts believe. Dr. Douglas Vaughan is among them ...

With so much to do heading into the busy holiday season, is anyone getting enough sleep? Most sleep experts advise that adults get seven to nine hours of sleep per night for good health and emotional ...

The emission of photons by excited nuclei has been explored for timekeeping and sensing, but nuclear processes that eject electrons offer practical advantages. Electrons in atoms can exist only in ...

The Wall Street Journal’s Kate Linebaugh, Damian Paletta and Aaron Kuriloff took subscriber questions after the Fed made its decision on interest rates. Photo: Caroline Brehman & Tom William/ZUMA ...