Fitibit's wristbands have collected 150 billion hours' worth of heart-rate data from people around the world. For the first time, the company offered a look inside that data, to see how lifestyle, location, age, and gender affects our health and longevity.

Genetic analysis uncovers a direct descendant of two different groups of early humans.

The struggle to keep this resistant yeast from surging is a warning sign that relying on standard responses won't work. As the foes continue to evolve, medicine needs both new tech, and surprisingly old techniques, to fight its microbial wars.