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From penguins to nematodes - is it possible to count how many animals are born around the world every day? That's the question one 10-year-old More or Less listener wants answered, and so reporter Kate Lamble sets off for the zoo to find out. Along the way, she discovers that very, very small animals are much more important than very, very big animals when it comes to the sums. [Photo: New born chicks huddle together. Credit: Shutterstock]