A mysterious and highly active undersea volcano off the Pacific Coast could erupt by the end of this year, scientists say.

Nearly a mile deep, the Pacific Ocean volcano known as Axial Seamount is drawing increasing scrutiny from scientists who only discovered its existence in the 1980s.

According to the USGS, Mount St. Helens is the most active volcano in the lower 48 states and the most likely in the Cascades to erupt again.

The volcano is thousands of feet below the ocean’s surface, so it poses no danger to people. But under all that water, a ...

Soar over the haunting remains of Plymouth, Montserrat, with breathtaking drone footage, capturing the eerie beauty of the Caribbean’s only ghost town. Once a thriving capital, the city now lies ...