Mark Miodownik is an engineer and materials scientist at University College London. He is also the Director of the Institute of Making and one of the curators of the Materials Library, which brought Smelting, Melting & Casting to the Secret Garden Party in 2009. As part of our collaboration with the Secret Cinema for their production of Alien, he brought a sample of Aerogel (also known as “frozen smoke”), the lightest solid in the world and a component of the space shuttle.