Monkeys are eating dirt after consuming tourist junk food CTV NewsGibraltar’s monkeys have found a clever way to avoid a junk food bellyache – eating soil The Globe and MailMonkeys ‘learn to eat soil to cope with junk food’ BBCGibraltar’s monkeys eat mud ‘to avoid upset stomachs from tourist junk food’ The GuardianMonkeys eating soil to settle upset stomachs from junk food, says research Sky News