Ever wondered why humans effortlessly grasp a glass of water, whereas this is almost impossible for robots? Why does the world look stable when we move? Why is the sky blue and snow white? How do we hear, feel and see? How do we control our movements? To answer such questions a detailed understanding is needed of how we perceive and move. This is addressed by studying how our sensory organs obtain information about the world and how it is processed in our brains to control our movements.