At the very edge of the grid, Port Graham and Nanwalek hope ocean wave energy can bring cheaper, more reliable electricity.

From land, a rip current can appear relatively calm, as a strip of water that extends out between breaking waves. Its ...

Floating about 500 feet offshore of Illinois Beach State Park, Hillary Glandon tightened her scuba goggles, grabbed a small masonite plate from a nearby kayak and dove beneath the Lake Michigan ...

A beam of energy hit the slab of rock, which quickly began to glow. Pieces cracked off, sparks ricocheted, and dust whirled ...

Air rings blown by dolphins swimming underwater and rings of smoke emitted by jet engines are just two examples of vortex rings. These doughnut-shaped structures and their mesmerizing movement have ...