The new rules call for testing unpasteurized milk from dairies across the country and for farm owners to provide details that would help officials identify and track cases more easily.
The price of a single Bitcoin rose to six figures for the first time, an extraordinary level for a 16-year-old cryptocurrency once dismissed as a sideshow.
A study of a 12,800-year-old skull of a toddler offers a glimpse at how early Americans found food, and how their hunts may have led to a mass extinction.