S2 E4: Wildlife: What is the Island Effect?

A couple of years ago, a group of people in nice long white lab coats (some call them scientists) set about solving a mystery about animals on islands. They had 2 interesting clues to get on about(a) a rodent the size of a 2-year old child. It was scurrying around eating up large chunks of your cake in one go.(b) a hippo similar in size to young children.A biologist called Foster first suggested this strange and funny phenomenon he noticed in islands, which he called 'an island effect'. ...