Unlike one year ago, what's typically the busiest month for tornadoes in the U.S. hasn't been quite that active this May. But a pattern shift could change that ahead. Here's where and when.

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.

Here's when you'll want to keep an eye out for this one.