Science Week: Why are worms good for the garden?

To celebrate Science Week we're unearthing a special episode of Gardening Australia Junior! The theme of this year's Science Week is 'Seeds of Science: Nurturing knowledge for all'. They're not just talking about planting seeds in the ground. It’s about planting seeds of curiosity too! Every great scientific discovery starts with wondering about the world around us... Why is the sky blue? Why do apples fall from trees? What’s hiding underneath our feet? Join Costa, Nij and the Gardening Australia Junior crew in learning all about the secret lives of worms.