This week we take a dip in the Amazon to meet the red-bellied piranha. We ask if its blood thirsty reputation is really justified or is there a softer side to this toothy fish? In the news we look at a new fossil species of bird relative and what it means for their evolution. All this and more....

This week we meet the enormous elk... or should it be called a moose? Join us to discover more about the world’s largest and most recognisable deer species. In the news, Australia has a new bird species on its books: the emperor penguin. All this and more. The cupboard is open, come on in!