"There are as many ways to breath as there are foods to eat," said one... instructor... Another diver told me that some methods of breathing will nou… - James Nestor

Japan and Iceland... want to keep hunting sperm whales, and are petitioning to do that... [I]f we're able to prove their intelligence and their capacity for communication we might be able to establish them some... rights.

I found out later that these clicks are actually used for communication. These animals also use them to see in the deep ocean. ...It's a form of called echolocation.

An infant will reflexively breaststroke when placed when placed underwater and comfortably hold his breath... longer than many adults.