Orcas have long been revered for their intelligence, adaptability, and group-hunting strategies. But one scientific review spanning two decades has revealed a little-known, yet intriguing behavior.

Scientists have documented what might be the first case of friendly interactions between killer whales and smaller cetaceans. Here's what they think is going on. Pacific white-sided dolphins swim off ...

Why is marine life eating plastic? Scientists say their sonar is being fooled. How do dolphins and other toothed whales mistake plastic for food? At the Duke Marine Lab in Beaufort, North Carolina, ...