And Whitbread, which owns Premier Inn, Beefeater Grill and Brewers Fayre, says it found horse DNA in two products - burgers supplied by food supplier Paragon Quality Foods and lasagne from Brakes Brothers.

BBC: Horsemeat: Compass and Whitbread find horse DNA in products - BBC News

The researchers at Harvard couldn't run a randomised controlled trial where half the participants ate burgers for two decades and the other half didn't, but they could use statistical techniques as the next best thing.

BBC: Red meat: What is a 13% increase in the risk of death?

Burgers containing horsemeat have been discovered at two agricultural campuses in Northern Ireland, the agriculture minister has confirmed.

BBC: Northern Ireland

On Thursday, police in the U.K. arrested three men on suspicion of fraud following raids this week at two British meat plants as part of an inquiry into kebabs and burgers that purported to be beef but were in fact horse, according to the U.K. Food Standards Agency.

WSJ: U.K. Arrests Men in Horse-Meat Probe

University students who complete their degrees may stay on for two years only if they land a skilled job at a reasonable salary, rather than hanging around hopefully or flipping burgers.

ECONOMIST: Student visas