Humans aren’t the only mammals with a lot to say. The region’s orcas are frequently communicating beneath the water’s surface, using a rich vocabulary of sounds. Unlike the endangered Southern ...

SAN JUAN ISLAND, Wash. – As dawn broke over San Juan Island, a team of scientists stood on the deck of a barge and unspooled over a mile of fiber-optic cable into the frigid waters of the Salish Sea.

Orcas are at the top of the marine food chain, with no natural predators. From fish to seals, even great white sharks, ...