Lava in Hawaii, seismic shaking in Alaska and underwater rumblings near Oregon. Scientists say it’s not the end of the world, but it’s definitely worth watching.

True to form for July, another round of searing heat and stifling humidity is on the way. Here's how hot it may get, who will sweat the most and how long it will last.

The National Hurricane Center now has its eyes on a tropical wave well over 500 miles east of the Lesser Antilles. It has a shot to be the season’s next tropical depression or storm before conditions become less favorable by the middle of the upcoming week. It could bring showers to parts of the Caribbean as it moves westward.

Geologists working in Yellowstone National Park discovered a new pool of strange light blue water this spring. Using satellite imagery, they have now been able to determine exactly how and when this new feature was born.

Big changes are coming to airport security just in time for summer travel: TSA is phasing out the long-standing rule that requires passengers to remove their shoes at checkpoints. As storms and heat waves disrupt flights nationwide, this update could help speed up the screening process and bring a little relief to travelers hustling through busy airports.