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Three factors in midlife can delay the onset of dementia by 13 years5 hrs

An active lifestyle in middle age can lead to many extra years without dementiaRichard Levine/Alamy

People who steer clear of smoking in their mid-50s, while also maintaining healthy habits that stave off diabetes and high blood pressure, can expect to gain an additional 13 dementia-free years compared with those who live less healthily during midlife.

We already...

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Swallowing faecal capsules reduces peanut allergy in six adults5 hrs

Altering the gut microbiomes of people with peanut allergy using faeces donated from an allergy-free individual improved their peanut tolerance in a clinical trial

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The mathematics of balloon animals5 hrs

Josie Ford

Feedback is our weekly column of bizarre stories, implausible advertising claims, confusing instructions and more

Bloons and doubloons

This edition of Feedback is an exercise in time travel – in that every item is something...

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At what point does my family tree stop doubling and start decreasing?5 hrs

Readers debate how the introduction of bicycles and trains will have led to less closely related prospective partners for our ancestors – and consider various royal dynasties from this perspective

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