You are in the forests of North America, 154 million years ago.

You were nestled behind the massive buttress roots of a towering conifer for a break from a long trek, when a sudden rustle in the ferns a few meters away snapped your attention.

At first, you saw only the foliage parting. Then, a long, elegant tail, acting as a perfect counterbalance, swayed into the clearing, followed by a head that seemed to be observing the world with intense, rapid movements. It was an Ornitholestes.

No larger than a modern raptor, perhaps two meters from snout to tail, the animal was far more bird-like than the sluggish reptilian caricatures of your childhood. Its skin was mottled grey and brown, with a light, feathered covering along its neck and back.

The little "bird robber" stopped just three meters away, completely oblivious to your presence. Its eyes, large and intelligent, locked onto a small, lizard-like creature hiding in the foliage. It didn't rush. It stalked—a fluid, agonizingly slow motion, its three-fingered hands holding tight to the ground.

Then, it struck. With a speed that defied the heavy air, it snatched the lizard with its delicate, sharp-toothed jaws. For a moment, it lifted its head, turned towards you, and a sharp hiss escapes its throat…