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Science

Death of the calorie

For more than a century we’ve counted on calories to tell us what will make us fat. Peter Wilson says it’s time to bury the world’s most misleading measure

One tiny leap

It may seem minuscule, but a row over a missing second could cause chaos in financial markets and deprive Britain of its position at the centre of the world’s time. Tom Whipple investigates

The human layer

Is humanity’s impact on its environment enough to usher in a new geological era: the Anthropocene?

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