The other factor helping the army to reverse its fortunes last year was better intelligence.

ECONOMIST: Colombia

But scientists from three hospitals in Boston, USA, found that they could temporarily reverse the effects by extracting skin cells from patients whose DNA can't make factor VIII.

BBC: Genetics work eases haemophilia

"Since there is no evidence to pin the widespread declines of bee populations on any single factor, a proposed ban on neonicotinoids is unlikely to deliver any benefits that will halt or reverse these declines, " he suggested.

BBC: Bee deaths: EU delays action on pesticides ban