You are in the forested plains of Mongolia, Asia, 40 million years ago.

The wind howling across the Eocene plains usually carries the scent of dry earth and distant rain. Today, it carried death.

You stayed low behind the rocky outcropping, your lungs burning from the dusty air. Just then, you hear a snapping noise. It wasn't a twig. It was a massive jaw crushing bone.

You turned just enough to see it emerge from the brush. It was a nightmare of fur and muscle, easily the size of a grizzly but longer, lower, and distinctly... wrong. Its head was huge, far too large for its body, ending in a massive snout designed for carnage.

The creature locked onto you, its eyes focused with terrifying intelligence. When it moved, it didn't lumber like a bear; it had the purposeful, predatory gait of a giant cat, its tail helping it balance. It didn't roar. It didn't need to. It was a silent, efficient predator…