Animals also choose their mates, sometimes with a great deal of care. Mating systems are important to understand because they reflect the result of natural selection on mate choice, and ultimately ...

See what scientists believe about humans' artificial selection pressures on the dog genome. Aa Aa Aa Any dog lover knows that Labrador retrievers are friendly, Dalmatians are hyper, and Australian ...

By identifying specific traits — such as size, coat color, and demeanor — and allowing only those animals to mate, we've created at least 167 different "breeds," or groups of dogs with unique ...