Experts speculate that orcas may be playing when they ram boats so hard they sink—a phenomenon that’s mostly been documented ...

This visual guide explains the interactions that orcas, also known as killer whales, are having with ships and why scientists think it's happening.

Heart-stopping video shows the moment a pod of orcas swarms a tourist sailboat about five miles off the coast of Portugal.

Five people were rescued from a tourist vessel that was attacked by orcas off the Portuguese coast on Saturday, authorities ...