Oysters are so much more than a seafood delicacy. They're ecosystem engineers, capable of building remarkably complex reefs.

From Hawaii's Papakōlea Beach to Butiama Beach in Tanzania to Reynisfjara in Iceland, there are many incredible beaches all ...

Some 326 miles (525 km) off the coast of Brazil, the volcanic archipelago Fernando de Noronha is replete with lovely beaches.

A team of scientists tracked more than 400 corals that experienced intense ocean heat last year. More than half the corals died.