You are in the vast forested plains of North America, 152 million years ago.

The air in the Late Jurassic basin is thick, hot, and smells of fern pollen. Across the sparse, tree-dotted prairie, a line of gigantic reddish-brown shapes moves with slow, rhythmic deliberate force. This is a herd of Diplodocus, some measuring over 30 meters from their small heads to the tips of their long, whip-like tails. On the move, they let out deep, bellowing calls, and low, resonant rumbles that conveys a sense of their remarkable presence. They are not merely walking; they are reshaping the landscape as they stop by to graze over the large areas of vegetation.