WASHINGTON, May 9, 2012 /PRNewswire-USNewswire/ -- NASA researchers have flown off on a campaign that is taking them into the heart of thunderstorm country. (Logo:

NASA researchers are about to fly off on a campaign that will take them into the heart of thunderstorm country.

Scientists are targeting thunderstorms in Alabama, Colorado and Oklahoma this spring to discover what happens when clouds suck air many miles into the atmosphere from Earth's surface.

HARRISBURG, Pa., April 30, 2012 /PRNewswire-USNewswire/ -- Pennsylvania will join states across the nation in recognizing April 30 through May 4 as Air Quality Awareness Week, the Department

Fossilized raindrop impressions have shown scientists evidence of greenhouse gases in Earth’s early atmosphere.