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Extinct relative of koalas discovered in Western Australia

Fossils reveal that there were at least two kinds of koala when humans first arrived in Australia, but one died out about 30,000 years ago when the west of the continent dried out

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Why birds are the only surviving dinosaurs

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Why birds are the only surviving dinosaurs

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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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Surprise fossil discoveries push back the evolution of complex animals

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

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

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Top predators still prowled the seas after the biggest mass extinction

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Tiny predatory dinosaur weighed less than a chicken

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New fossils may settle debate over mysterious sail-backed spinosaurs

Spinosaurs have sometimes been portrayed as swimmers or divers, but a new species of these dinosaurs bolsters the idea that they were more like gigantic herons

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

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Our earliest vertebrate ancestors may have had four eyes

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T. rex took 40 years to become fully grown

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6 incredible new dinosaurs we discovered in 2025

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