Last May, a massive tornado leveled Joplin, Missouri. Was it chance, or a warning of things to come?
Severe weather took a large toll on life and property in the U.S. last year, partly because people didn't trust or understand weather forecasters.
2011 was no ordinary year as Mother Nature slammed Americans with one deadly weather event after another.
As temperatures warm and animals hosting infectious diseases take on a wider range, many factors come into play complicating predictions on what to expect
The newly discovered virus Hendra has roared fully into life with more outbreaks in 2011 than in the 16 previous years.
Rising temperatures and gene mutations have given apparently unflagging legs to the current cholera epidemic. But researchers are finding ways to fight back.
The worst nuclear disaster in history has faded from many peoples' memories — but in Ukraine, where it all happened, its devastating effects are still unfolding.
Pollen season is lengthening in proportion to warming observed in North America: An extra two weeks, on average, across Wisconsin, Nebraska, and Minnesota.