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Titanochelon was 2 metres long and roamed the ‘streets of Madrid’ between 20m and 2m years ago, study finds
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Evidence suggest 250-million-year-old marine reptile had terrestrial ancestors, scientists say
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Rodent-like Vintana sertichi lived over 66 million years ago alongside dinosaurs on the supercontinent Gondwana
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Scientists confirm existence of a new species of frog in and around New York City
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Hunting owl, galloping blesbok and millions of flying fruit bats are among the winning images picked by the Society of German Nature Photographers
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Tim Birkhead recalls his early research on the guillemots of Skomer and asks for your help to keep the project going
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Venomous spider found in Waitrose shopping 'beautiful but aggressive'