Dr O'Donoghue says that these 19th Century wildcats show the size and power of this species - saying that they were as different from a domestic cat as a wolf from a dog.
John Coates, a former Goldman Sachs and Deutsche Bank trader turned neuroscientist, documents his stunning research on brain chemicals in his new book, The Hour Between Dog and Wolf: Risk Taking, Gut Feelings and the Biology of Boom and Bust.
Even the dog's closest relative, the wolf, beat its cousin when food was placed on the opposite side of a fence, as shown in a 1982 study by Harry and Martha Frank of the University of Michigan.