Straight out of the March textbook, a major storm will hammer in the Midwest this weekend, followed by a blast of cold air into the Southeast. Here's the latest forecast.

For the third time this month, we're forecasting an outbreak of severe thunderstorms. This time, the threat is mainly damaging winds, but a few tornadoes are possible. Here's where and when the threat is in play.

Emperor penguins seem to be vanishing by the thousands during their most vulnerable period, when they must shed and regrow their feathers on stable ice.

A super El Niño is possible by the end of the year. Here's what warming waters in the Pacific could mean for this summer and the rest of the year.

A new species of Rickettsia bacterium called Rickettsia finnyi has been identified by researchers after analysis of samples from dogs across the central and southeastern U.S. The bacterium is spread by ticks, and though the team behind the study isn’t able to confirm the species of tick responsible, it is possible that the lonestar tick is the culprit. As temperatures warm up, pet owners and pets alike are likely to spend more time outdoors, so proper tick etiquette is essential. Take measures to prevent a tick bite and check your pets for ticks after going outside. If you spot a bite on your pet that looks suspicious or concerning, go see the vet.