Late Cretaceous · 70 million years ago
What you're walking through
70 million years ago, near the end of the age of dinosaurs, flowering plants had spread across the land. Magnolias, palms and broad-leaved trees grew among the older conifers and ferns, along warm, wet lowlands running down to an inland sea.
It was the last great chapter of the dinosaurs. A few million years later, an asteroid struck what is now Mexico, and the world you're walking through came to an end.
Who lives here
Tyrannosaurus rex
About 12 m long · meat eater · 68–66 million years ago, western North America
One of the largest land predators ever, with a bite strong enough to crush bone. It lived right up to the asteroid impact that ended the age of dinosaurs.
Triceratops
About 8–9 m long · plant eater · 68–66 million years ago, western North America
Three horns and a solid bony frill, on a body the size of a bus. It shared its world with T. rex, and fossils show the two really did fight.
Parasaurolophus
About 9.5 m long · plant eater · 76.5–73 million years ago, western North America
A duck-billed dinosaur with a long hollow crest. Air passing through the crest likely made deep, trombone-like calls that carried across the herd.
Velociraptor
About 1.8 m long, turkey-sized, feathered · meat eater · 75–71 million years ago, Mongolia and China
Far smaller than in the movies, and covered in feathers, which this model leaves out. It hunted small prey with the big sickle claw on each foot.
T. rex and Triceratops lived side by side; Parasaurolophus lived a few million years earlier, and Velociraptor in Asia. They share one valley here so you can meet them all.
How to walk
Press Start walking above. WA SD or the arrow keys move you, the mouse looks around, Shift runs and Space jumps. Look at an animal to see what it is. Esc pauses, and M turns the sound on or off. You're invisible: nothing here can see you.
Other times
4 billion years ago
Early Earth
Lava fields and smoking volcanoes, under falling meteors and a huge Moon. Nothing is alive yet.
150 million years ago
Late Jurassic
Conifer forests and ferns, with Apatosaurus herds and Stegosaurus.
20,000 years ago
Ice Age
Snowy steppe and pines, with woolly mammoths and saber-toothed cats.