While most in the U.S. are enjoying spring warmth, heavy, wet snow has blanketed the high country of several western states. Here's why that's not as weird as it sounds by May standards.

Rescue centers are overwhelmed as disoriented animals wash ashore, victims of a fast-growing toxin fueled by warming waters and pollution.

Apple snails are an invasive species generally banned from import and movement across state lines. Watch this video to learn about the environmental destruction they can cause, the potentially deadly risk to humans and why wildlife officials in southern states like Texas, Georgia, North Carolina and Louisiana want you to look out for the snails’ bright pink eggs.

Clouds may look like cotton candy, light and fluffy and completely weightless, but they actually do have weight. Quite a lot, in fact. Here’s the math behind the weight of your standard cumulus cloud.

People in a small town in eastern Texas are starting to pick up the pieces, waiting to find out if it was a tornado that toppled massive trees and seriously damaged several structures during severe storms Tuesday. Watch this video for the latest.