The phenomenon is both spectacular and mysterious: How do the insects learn these particular routes and why do they stick to them?

Long-term data suggests that an early snow melt in the Rocky Mountains starts a chain reaction that ends with decreased butterfly population.

Summertime hail could all but disappear from the eastern flank of Colorado's Rocky Mountains by 2070, according to a new modeling study by scientists from NOAA and several other institutions.

HOUSTON, Nov. 3, 2011 /PRNewswire/ -- Copano Energy, L.L.C.

HOUSTON, Oct. 19, 2011 /PRNewswire/ -- Newfield Exploration Company (NYSE: NFX) today reported its unaudited third quarter 2011 financial and operating results.