Dolphins are notoriously smart – expressing emotions like joy and grief; maintaining cooperative social networks; and solving ...

With concerns about Iran laying mines in the Strait of Hormuz, US Secretary of Defense Pete Hegseth was asked Tuesday whether Iran might turn to dolphins to help confront the US Navy.

Researchers say Risso's dolphins are benefiting from the increase of octopus in the south west.

Several countries, including the U.S., have a history of using dolphins in conflict areas, though not as weapons.

Defense Secretary Pete Hegseth said the military could “neither confirm nor deny” their use.

From Iran's purchase of Soviet-trained dolphins to the U.S. Navy's own marine mammal program, what you need to know about this unusual Pentagon briefing.