Nature's Rule Breakers

Some rules are meant to be broken, even those in the animal kingdom!You''re probably familiar with many of the common categories scientists use for animals: warm-blooded or cold-blooded, nocturnal or diurnal. But what about the animals that don''t fit in? Sharks cannot be classified as warm or cold-blooded—they are somewhere in-between. And Eurasian eagle owls don''t hunt during the day or night. ...