You've probably played with magnets before - these fascinating items can exert control over another object without even touching it. So how do they actually work? Watch as Robert and Julie demonstrate the mighty power of magnets in this episode. Subscribe | bit.ly/stbym-sub Homepage | bit.ly/stbym-hsw-home Listen to us | bit.ly/stbym-itunes Like us | bit.ly/stbym-fb Follow us | bit.ly/stbym-twitter Google+ | bit.ly/stbym-gplus Prepare for a trip down the rabbit hole as Robert Lamb and Julie Douglas lead you on a scientific journey to the very limits of human understanding. "Stuff to Blow Your Mind" examines neurological quandaries, cosmic mysteries, evolutionary marvels and the technological underpinnings of our transhuman future.