You are in the deep oceans of North America, 227 million years ago.

The water pressure was immense, but you felt only awe. Through the murky, teal depths, a silhouette appeared, then another. They were Shonisaurus—not creatures, but living submarines. A pod of five surged upward, moving with a surprising, lazy grace that belied their 50-foot length.

Their long, toothed snouts pointed toward the glittering surface above. As a young one—small only by comparison—brushed past your viewing vessel, you saw the massive scleral rings in its eye, designed to see in the deep dark. They weren’t feeding; they were migrating, a social pod moving together across the Triassic sea.