Williams knew that when dolphins hit the surface, they get a lot done fast. They exhale and inhale quickly, clearing out carbon dioxide, balancing their body's pH and loading oxygen. Dolphins spend little time on the surface, because it's so inefficient to waste strokes battling waves. Perhaps, Williams began to wonder, they also take those opportunities to open up their blood gates and let loose all the heat they build up during their dive. If that were the case, dolphins would be the camels of the sea.
Camels store heat during the day and unload it in the cool of the night.
If Williams was right dolphins would have taken this strategy to its extreme, unloading heat in a matter of seconds. Noren tested Williams' hypothesis last summer with a female dolphin named Cayla. Every time Cayla took a breath, her heat flow more than doubled. Apparently then, Williams was right. The only puzzle is that the dolphin's anatomy seems to argue that such asolution is, to say the least, problematic.