Scientists are warning of dramatic changes at one of the biggest glaciers in Antarctica, potentially within the next five to 10 years.
They say a floating section at the front of Thwaites Glacier, that until now has been relatively stable, could "shatter like a car windscreen".
Already it is dumping 50 billion tonnes of ice into the ocean each year.
Meanwhile, in Siberia, the highest temperature ever recorded in the Arctic – 38C (100F) – has been officially confirmed, sounding "alarm bells" over Earth’s changing climate.
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