I watch as an adult robin picks a spot in the turf to begin its search for worms. As soon as he digs for a worm, gray-colored offspring with spotted breasts join the robin from the trees, hoping for it to share the worm with one of them. They are old enough to dig for themselves, but have not yet been weaned. The adult robin makes his attempt at weaning them by hopping away.
Who instilled these instincts, or developed them over the eons? As we know from physics, there is no movement without a push, or impulse. Where do these robins come from? Sure, I can see them court and sometimes nest, but are you satisfied with that answer? Can you think beyond?
Civilization 