City Squirrels Look Different. Is Evolution Driving a Color Change?
Black squirrels — a relic of ancient, old-growth forests — are now more common in cities. To understand why, scientists want to track the color of squirrels in your backyard.
Black squirrels — a relic of ancient, old-growth forests — are now more common in cities. To understand why, scientists want to track the color of squirrels in your backyard.