Skiing faces a number of challenges, including ageing participants, climate change, and even Brexit.
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How a Brazilian company put itself at the forefront of biological pest control - using insects to control other bugs.
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The volunteers pushing to get up to three million Indian girls into school instead of becoming child brides.
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The interest rate set by America's central bank, the US Federal Reserve, is one of the key levers of the global economy.
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Imagine pointing your phone's camera at any object and being given useful information about it.
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This simple yet transformative piece of technology made civilisation possible.
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