That sent a little chill down my back.

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As Lionel Messi placed his feet onto the Camp Nou turf you could see a visible chill go down the spine of each and every Paris Saint-Germain player.

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At Mach 4 or 5, the air flow would become dangerously hot but this heat exchanger - consisting of a dense and closely-guarded bundle of tiny tubes - would chill things down to a manageable temperature in milliseconds.

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Sit down, chill or dance.

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Wearing a black wool cap pulled down against the biting chill of a Chicago winter morning, Vallas bounds up to the doors of tenements on the city's gritty South Side.

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On a clear, blue day, gusts of wind buffet down from the peaks, picking up the fresh chill of the snow.

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The Los Angeles metropolitan area keenly felt the chill, with an overnight low in Hollywood expected to dip down to 38 F.

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The wind chill today will slice us up - it's taking the temperature down to below -50C, so we have decided to take a day's rest to recharge our batteries and soothe the aches and pains.

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Chill with the howler monkeys and exotic butterflies while ziplining through the rainforest trees, or zoom down a river on a white-water raft.

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