Download and print your Principia Space Diary: http://principiaspacediary.org As part of the Principia Mission Space Diary project - supporting Tim Peake's mission to the International Space Station - astronomer Sheila Kanani talks to Lucy Hawking about doing experiments in space. This video accompanies Chapter Four of the Principia Mission Space Diary. Sign up at principiaspacediary.org/sign-up to get exclusive access to the book, to download and complete at home or in the classroom. We also supply a Classroom Kit for teachers and educators with lots of resources, tips and information around the theme of a spacecraft launch. Tim Peake's Principia Mission: http://principia.org.uk Watch Tim Peake's launch live from the ESA: http://www.esa.int/Our_Activities/Human_Spaceflight/Principia/Principia_live This project is produced by Curved House Kids and supported by the UK Space Agency, the European Space Agency, Queen Mary University of London and the London Science Museum. The space diary crew are author Lucy Hawking, Publisher Kristen Harrison at The Curved House, Professor Peter McOwan at Queen Mary University of London and illustrator Ben Hawkes. Intro/Outro animated by Timothy Armstrong Music by Nina Hynes Edited and produced by The Curved House (www.thecurvedhouse.com)