This page is a warm, green floodplain in western North America about 150 million years ago. Move your pointer and your dinosaur will follow you. Choose a different one at the bottom, and tap the notes to open them.
Its tail had about eighty bones and tapered to a thin lash. It may have cracked it like a whip.
A cast of a Diplodocus skeleton nicknamed Dippy stood in the Natural History Museum in London for over a century.
It had peg-like teeth only at the front of its mouth, for raking leaves off branches. It did not chew.
It is one of the longest dinosaurs known from a complete skeleton.
Its backbones were full of air spaces, which kept the weight down.
The name comes from the two-pronged bones under its tail.
Meet them all
Double beam · dip-LOD-oh-kus
An immensely long, slender dinosaur with a small head, a long neck and a tail like a whip.
Arm lizard · BRAK-ee-oh-SORE-us
A towering dinosaur with front legs longer than its back legs, a very long neck held high and a domed head.
Deceptive lizard · ah-PAT-oh-SORE-us
A heavy long-neck with a thick neck, a deep body and a long whip tail.
Roof lizard · STEG-oh-SORE-us
A big plant-eater with a tiny head, two rows of upright plates down its back and four spikes on its tail.
Different lizard · AL-oh-SORE-us
A large hunter with a big head, a small horn in front of each eye, three-clawed hands and a long tail.
Horned lizard · seh-RAT-oh-SORE-us
A medium-sized hunter with a horn on its nose, a small horn over each eye and a row of bony studs down its back.
Good to know
The Jurassic is the middle period of the age of dinosaurs.
Pangaea began to break apart, and seas flooded in between the pieces.
The climate was warm and damp, and forests of conifers, ferns and cycads spread.
Huge size was a defence. A full-grown long-neck was too big for any hunter to tackle.
Much of Britain lay under a warm, shallow sea full of sea reptiles and ammonites.
By the end of the Jurassic, small feathered dinosaurs had taken to the air.
The Jurassic: 1 more place
Real fossils, skeletons and museum models of the animals on this page. Tap one to see it bigger.
Photos are from Wikimedia Commons and are used under free licences. They have been resized, and cropped where they appear in link previews. Open a photo to see who took it.
All six of these lived in the same place at the same time. Their bones lie together in the rocks of the Morrison Formation, across the American West.
Back to the topAnimals from other periods live on their own pages: choose another.