You are in the forests of Argentina, 235 million years ago.

While walking through the Triassic undergrowth in what is now Argentina, you stopped, hearing a faint rustle in the dry ferns. Suddenly, a small creature, no larger than a pigeon, burst into a clearing—a Lagosuchus.

It wasn’t on all fours like a lizard; it was perfectly bipedal, standing on incredibly long, slender hind legs. For a second, it froze, looking at you with bright, intelligent eyes. It was incredibly fast as you could truly process its delicate structure…