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palaeontology

Tyrannosaurus rex dinosaur, illustration

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We may finally know why dinosaurs like T. rex evolved tiny arms

Five different groups of predatory dinosaurs independently evolved disproportionately small arms, and it seems they did so because their heads became so large and powerful

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Extinct relative of koalas discovered in Western Australia

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Why birds are the only surviving dinosaurs

Video

Why birds are the only surviving dinosaurs

Video

A sketch of the giant octopus

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Largest-ever octopus was great white shark of invertebrate predators

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An ancient radiolarian

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Hidden fossils reveal secrets of oceans before major mass extinction

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Life

Surprise fossil discoveries push back the evolution of complex animals

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Life

Fossils discovered in Egypt may be the closest ancestor of all apes

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Life

Ancient 'weirdo' reptile graduated from 4 legs to 2 in adolescence

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Life

Top predators still prowled the seas after the biggest mass extinction

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Life

Tiny predatory dinosaur weighed less than a chicken

The alvarezsaurs were thought to have evolved a smaller stature because of their diet of ants and termites, but a new fossil found in Argentina casts doubt on that theory

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Life

New fossils may settle debate over mysterious sail-backed spinosaurs

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Life

Huge fossil bonanza preserves 512-million-year-old ecosystem

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Life

Our earliest vertebrate ancestors may have had four eyes

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Life

T. rex took 40 years to become fully grown

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