Ancient Balloon-Headed Dolphin discovered

The remains of a 2.5 million year-old dolphin with a spoon-shaped snout and large head was pulled up by a Dutch fisherman in the North Sea in 2008, and scientists now think it is a distant relative of the pilot whale. They believe its large head may be used for echolocation, which is a biological form of sonar that allows dolphins and certain whales to navigate murky waters.

Photo via National Geographic

For more information on the newly discovered mammal, click here for the article in Dutch journal Deinsea.