ANY SCHOOLCHILD is aware of {that a} whale breathes via its blowhole. Fewer know {that a} blowhole is an tailored nostril, tweaked by evolution right into a type extra helpful for a mammal that spends its life at sea. And solely a devoted cetologist would know that whereas toothed whales, equivalent to sperm whales and orcas, have one gap, baleen whales, equivalent to humpback and Rice whales, have two.
