How mudlarking on the Thames unlocks London’s secret riches

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People rescued from rooftops as flooding hits northern Italy – video

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‘It’s guerrilla warfare’: Brazil fire teams fight Amazon blazes – and the arsonists who start them

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One year of Guardian Europe: different stories through a new lens

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Week in wildlife in pictures: Hampshire beaver babies, bubbly lizards and a shopaholic koala

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Fish! Do they have feelings? Now everyone wants to know about the emotional lives of fish! | First Dog on the Moon

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Wildfires ravaging northern Portugal – in pictures

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Knowing polluting impact of home fires could modify behaviour, study finds

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UK’s first ever bison bridges under construction in Kent woodland

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Country diary: A mission to help gardening’s invertebrate collateral damage | Phil Gates

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