I Bet I Can: Dig a TunnelWhat is a tunnel and how do you build one? How do you see inside it and what tools do you need? This series looks at how things work, such as how a plane can fly or a boat can float, through the comical endeavours of an inventor who tries to replicate what he sees without knowing the science, with hilarious results. We discover what went wrong and why, through the scientific explanations that follow each attempt, making tricky concepts accessible and