You are in the oceans of Europe, 190 million years ago.

The water of the Early Jurassic sea was warm, clear, and deceptive in its tranquility. You were drifting, scanning the shallow seafloor for ammonites, when the light changed. A massive shadow passed over you, blotting out the sun.

You looked up to see a long, serpentine neck curving gracefully through the water, effortlessly propelling a relatively small head forward. It was an Attenborosaurus, a marvel of marine evolution. Four large paddles maneuvered the sleek, dark-skinned creature with surprising agility, smooth, membranous skin covering its muscles, devoid of heavy scales.

The Attenborosaurus wasn’t hunting you. Its enormous, needle-sharp teeth—designed for catching fast fish—were closed, its eye focusing instead on a shimmering school of prey ahead. It glided past, a silent, efficient hunter of the 190-million-year-old deep, reminding you that you were merely a fleeting visitor in its magnificent, dangerous world.