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A whale (cetacean) is a massive mammal that lives in the ocean. It relies on fresh air just like other mammals, and unlike fish. The whale is warm-blooded like animals, and unlike fish. But whales have many extraordinary features that ''not like'' other mammals, including:
* they decide when to breathe, rather than breathing unconsciously
* they sleep 8 hours a day, yet need to be conscious to breathe
* they can communicate with each other by making remarkably loud noises
* these extraordinary noises can travel for miles under water
* the females nurse their calves while swimming underwater
* the nursing calves are somehow able to avoid intaking saltwater while nursing
* the males have a unique cooling system for their internal reproductive organs
* some have two blow-holes, but others only have one
* the blow-holes pass air above water, yet resist intense pressure underwater
* they have massive brains, much larger than the brains of other mammals
The [[Public Broadcasting Service]], known for airing pro-evolution shows, admitted, "The evolution of whales has been a mystery."<ref>http://www.pbs.org/wgbh/evolution/library/03/4/l_034_05.html</ref>
== References ==
<references/>
* they decide when to breathe, rather than breathing unconsciously
* they sleep 8 hours a day, yet need to be conscious to breathe
* they can communicate with each other by making remarkably loud noises
* these extraordinary noises can travel for miles under water
* the females nurse their calves while swimming underwater
* the nursing calves are somehow able to avoid intaking saltwater while nursing
* the males have a unique cooling system for their internal reproductive organs
* some have two blow-holes, but others only have one
* the blow-holes pass air above water, yet resist intense pressure underwater
* they have massive brains, much larger than the brains of other mammals
The [[Public Broadcasting Service]], known for airing pro-evolution shows, admitted, "The evolution of whales has been a mystery."<ref>http://www.pbs.org/wgbh/evolution/library/03/4/l_034_05.html</ref>
== References ==
<references/>