You are in the forests of China, 165 million years ago.

The air in the lush, overgrown canyon was thick and humid, smelling of sulfur and damp vegetation. You were attempting to reach a certain area of the forest to find more prehistoric creatures, moving quietly past a large, freshwater lake.

Just then, you hear a noise. At first, there was only the sound of a low-frequency rumble, a deep buzzing sound that seemed to vibrate through the air, emanating from the thick canopy. Then, a creature emerged, walking with a stiff-tailed gait. It was about 18 feet long—a sleek, lethal carnivore. The most distinctive feature was the solid, single crest that ran from its nose up to its eyes, a jagged ridge that seemed to glow in the dim light.

A Monolophosaurus, you realized.

The meat-eating dinosaur stopped, its sharp, inward-curving teeth exposed as it tilted its head, and its intelligent eyes eventually fixed on you. It chirped—a surprisingly melodic noise for a killer—before crouching, preparing to sprint, its long claws tearing at the mud.

You didn't wait to see if it was hungry…