Wildlife changes from one side of North America to the other. Not just the type of animals, but each species itself. Squirrels, for instance, are mostly grey on the east coast, but brown in the west. In places with large amounts of snowfall, they can even be white. The squirrel’s fur color and other physical attributes formed over thousands of years in response to their environment. Such adaptations are how animals survive. Yet some creatures defy the logic of Darwin, evolving in ways that seem worthless, or even detrimental to their existence, leaving us to wonder how they came to be.
The first time I contemplated this was at 45 mph with both brakes locked up on my motorcycle.