Changes
/* Description */
* these extraordinary noises can travel for miles under water
* the females nurse their calves while swimming underwater
* the males have a unique cooling system for their internal reproductive organs, involving the circulation of cooled blood from the extremities directly around the [[testes]] before returning to the [[heart]]
* whales, along with humans and horses, are some of the few mammal species that do not possess [[baculum]] (penile bone)
* mysticetes have two blow-holes, while odontocetes only have one
