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Evidence, contained within an ice core, shows that in one location the West Antarctic Ice Sheet thinned by 450 metres — that’s more than the height of the Empire State Building — in just under 200 years. This is the first evidence anywhere in Antarctica for such a fast loss of ice.

Viagra may help to lower risk of Alzheimer’s disease, suggests new study of 260,000 men with erectile dysfunction. Men prescribed Viagra and similar drugs were 18% less likely to develop Alzheimer’s. The effect was strongest in men with the most prescriptions, with a 44% lower risk of Alzheimer’s.

After a heart attack in hospital, chances of survival drop rapidly as the duration of CPR increases | Chances of surviving while receiving CPR for a heart attack in hospital decline rapidly from 22% after one minute to less than 1% after 39 minutes.