December 10, 2013; 3:53 PM ET
The coldest air of the season so far is moving in for the middle of this week around New York City, in the wake of Tuesday's snowstorm. A new storm will move in this weekend. more >
Expect rainy weather Saturday morning through late Saturday night
Dec 10, 2013; 2:31 PM ET While snow is departing the Mid-Atlantic Coast, all of the ingredients are available for another snowstorm from the Midwest and Mid-Atlantic to the Northeast. Bernie Rayno has the details.
The sheer number of people, their interactions with animals and ecosystems, and the increase in international trade and travel are all factors that will likely change the way humanity deals with preventing and treating epidemics, experts say.