More or Less - Heart age calculator; Danish sperm imports; The size of the services sector; The 'safest car on the road'; Counting goats. - 成人快手 Sounds

More or Less - Heart age calculator; Danish sperm imports; The size of the services sector; The 'safest car on the road'; Counting goats. - 成人快手 Sounds


Heart age calculator; Danish sperm imports; The size of the services sector; The 'safest car on the road'; Counting goats.

Tim Harford questions the usefulness of a popular heart age calculator.

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