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Sleeping underwater presents a serious challenge for animals that still need oxygen to survive. Different species have evolved specialized strategies that allow rest without fully losing awareness or ...

SAN JUAN ISLAND, Wash. (AP) — 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 ...

Getting enough oxygen in the water can be hard work. While fish and many other aquatic animals take air directly from the water through gills, other animals find ingenious ways to drag air bubbles ...