Why Carnivores?

Learned that Alaskan bears like pine nuts (seeds). Bears getting tiny seeds one-at-time from pine cones? No, they raid the caches gathered by squirrels. Thus the food value has been concentrated for the bears. This seems to be analogous to the benefit of carnivore behavior. Saw a doc on the ancient body of a pre-historic hunter found in the Alps. It was explained that such a journey over barren terrain would not find much in the way of berries, fruit, etc. But animals there could be harvested.