The field guide

Spinosaurus guides

Everything worth knowing about the sail-backed giant, size, diet, habitat, the sail, speed and more, plus the matchups. Pick a guide to dive in.

Guides & answers

How big was Spinosaurus?

Length, height and weight, the largest predator ever.

See it to scale against T. rex, a human and a whale.

The fish-eating dinosaur's diet and toolkit.

The rivers of Cretaceous North Africa.

About 99 to 93 million years ago, before T. rex.

Slow on land, efficient in the water.

Display, heat, or something else? The theories.

The true story of the fossil giant.

The JP III star, movie versus reality.

Easy, fun Spinosaurus facts.

The full specimen dossier.

Quick answers, stamped with the verdict.

Matchups · Who would win