Pig grunts indicate their emotions

There are over 7,000 documented languages in the world to date, and now we might have another to add to the list: the one spoken by pigs. No, this is not an April Fool come early. Elodie Mandel-Briefer, from the University of Copenhagen, has assembled a vast dataset of pig noises. And by correlating the noises the animals produced in response to positive or negative experiences, she can pin emotions on sounds. Julia Ravey got in touch to find out if the research team responsible are completely off their trotters...