3000 ball bearings show crystal defects with Matt Parker

Watch Matt's video here: https://youtu.be/3inLMXcetUA I recreated an old desk toy called Atomix to demonstrate crystal defects like vacancies, grain boundaries and stacking faults. We touch a little bit on close packing problems in mathematics. That's what Matt's video is all about. Visit my blog here: http://stevemould.com Follow me on twitter here: http://twitter.com/moulds Buy nerdy maths things here: http://mathsgear.co.uk