Bang, crash, wallop! What is a sound? How do we hear? How do our ears work? Inventor of the telephone Alexander Graham Bell joins the team in the studio to talks telephones and metal detectors?!
Poo, pizza and disgusting germs! Why do we poo and how does digestion work? Who was Louis Pasteur and how did he help?
In this episode, Stefan visits a brand new hospital in London where he learns about measuring and controlling temperature and visits a school that uses data collection to run an energy saving campaign.