Sleep is a hot commodity—we want it, we need it, but most of us aren't getting enough of it. Subscribe to our newsletter for the latest sci-tech news updates. Factors like stress, jet lag, work, diet ...

Study finds major methodological differences across seven direct-to-consumer stool tests, producing taxonomic profiles as variable as those between individuals — limiting clinical use.

Nicole Kidman stars as Chief Medical Examiner in "Scarpetta," Amazon Prime's adaptation of the popular crime thriller novels by Patricia Cornwell.