Introduction

Imagine This is an ABC podcast. Today we've taken the Imagineerium in a submarine under the sea. How do fish swim underwater? You get a great view of all the fish swimming around from down here. Can life move in three directions - on land, we can only really move in two and we can go side to side. Do animals have up and down to work with 2 or 3 arms? If I jump as high as I can, I can go up and down too.