‘Not any old vermin’: rats numbers are on the rise thanks to global heating – and poison may not be the answer

Robert Corrigan has been dealing with the ‘smart’ rodents all his life – and believes there are better solutions to deal with the growing infestation in the world’s cities “The rodents have paid for every single bill I’ve ever had – every mortgage, every car payment, every pint of Guinness,” says Dr Robert Corrigan. “It’s been a great ride and I’m still at it.” New York-based Corrigan is one of the most respected voices in the world of rodentology. Now in his 70s, he has devoted his entire…