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Pantolambda

Life

Early mammals lived faster and died younger than modern ones

Skull and life reconstruction of Tyrannosaurus rex with original eye socket and eye (left) and hypothetical reconstruction with circular eye socket and enlarged eye (right).

Life

T. rex鈥檚 unusual eye sockets helped it evolve a powerful bite

Plesiosaur

Life

Plesiosaurs evolved awkward long necks thanks to their big bodies

Ancient mammal skulls

Life

Mammals grew big after dinosaurs died but their brains stayed small

ichthyosaur reconstruction

Life

Prehistoric ichthyosaurs evolved rapidly to be as big as whales

Reconstruction of the head of Brighstoneus simmondsi

Life

New species of UK dinosaur was 8 metres long with a bulbous nose

Reconstruction of the South American giant ground sloth Mylodon darwinii feeding on carcass

Life

Some ancient giant ground sloths dined on meat

Ground with fossilised footprint

Life

Prehistoric elephant nursery probably made easy prey for Neanderthals

Titanokorys gainesi reconstruction.

Life

Half-metre-long predator was giant of the seas 500 million years ago

Life

Land-dwelling turtles from the Cretaceous period had extra-tough eggs

ancient amphibian

Life

Some early land-dwelling amphibians evolved back into aquatic species

dinosaur

Life

We’ve finally figured out why there were no medium-sized dinosaurs