The first 76 people to sign up at https://brilliant.org/stevemould/ will get 20% off an annual premium subscription. Super fine steel wool looks beautiful in a microwave. Tough to film but I'm really happy with the shots that I got! Along the way we get into how mirrors work. More videos of things in microwaves (including CDs):    • Filmed inside a microwave   Self siphoning liquid video: https://www.youtube.com/watch?v=bOSVX8zOPkc Twitter: http://twitter.com/moulds Instagram: https://www.instagram.com/stevemouldscience/ Facebook: https://www.facebook.com/stevemouldscience/ Buy nerdy maths things: http://mathsgear.co.uk/