[Illustration: The relationship of a mother bear and her cubs can be fascinating to watch. Even hard-nosed biologists must quell the urge to describe this relationship in purely human terms! The relationship is best watched at a distance, however, because the mother is fiercely protective of her young. That protective instinct can prove dangerous for the unwary hiker or backpacker. Generally, however, bears will sense you first and avoid you entirely.] [Illustration: Cubs develop their strength and coordination in tumbling games of tag and wrestling. A cub is full grown at age 4. A bear is old by age 12. The park’s bear population varies from about 400 to 600.] [Illustration: A few years ago it was discovered here in the Smokies that bear denning sites are frequently in hollow trees 6 to 15 meters (20 to 50 feet) above the ground. Holes near the ground (photo) are not commonly used.] [Illustration: The intelligence of bears is often underrated. They seem to walk awkwardly, because their hindquarters are longer than their forelimbs, but they are agile and move rapidly.] [Illustration: _Imagine hewing your own home out of the surrounding woodlands with just a few hand tools. Such was the life of Smokies pioneers. Today you can peer into the past at the Pioneer Farmstead beside the Oconaluftee Visitor Center._] The Tracks of Our Predecessors Rocks rose out of the sea and became mountains. Plants clothed them and animals lived among the plants, all evolving and changing over the millions of years. A few thousand years ago, a dense green mantle of giant trees covered the Smokies. Bears roamed the forest and bison followed their ages-old trails across the mountains. Beavers built dams across lowland streams, and meadows followed when the beavers moved on. Elk and deer came out of the forest to feed in the meadows and cougars and wolves hunted the elk and deer. It might have gone on this way for even more thousands of years. But then people came. First Indians, then settlers, then the lumber companies. What was the impact of this new element, this two-legged animal? How did the forest and its life change? Is it now returning to its former state? In trying to answer these questions we may learn something about the ecological role of people not only in the Smokies but also in much of eastern North America, most of which resembled the Smokies in its forest cover when people first arrived on the scene.