But they could not crack the communication code. To do that you have to get below the surface. You have to see these animals... to gauge their behavi… - James Nestor

It's going to a lot harder to kill an animal that's able to speak its name.

[A]fter around 30 feet... the water stops buoying you... and starts dragging you down to the sea floor. ...[T]he deeper ...the more your body changes. ...Your organs allow for the free flow of fluids so they don't collapse. Your brain waves slow down. Your heart rate will slow to about 1/3 its resting rate.

They discovered that our capacity to breath has changed through... evolution, and that the way we breath has gotten markedly worse since the dawn of the .