It’s a mysterious realm right at the ocean’s edge where ... Twice each day, low tide briefly exposes this astounding world — a narrow band of rocky shore known as the intertidal zone.

It’s low tide around North Uist, a remote island off the West Coast of Scotland. Dark tendrils of seaweed lie glistening on the rocky shore, and a lone figure in orange waders moves methodically ...

When people think of rocky shorelines in the U.S., they picture ... it’s a different experience to go to the preserve at low tide. It’s a chance to walk down among the rocks and look for ...