Earlier this year we were joined by University of Auckland cognitive neuroscientist Professor Paul Corballis. He answered your questions on perception and how our brains work, which is such a big subject we barely scratched the surface in that session. So we've invited him back, but this time the focus is on phantom sensations .. like why amputees feel pain, and why we sometimes feel out phone vibrate in our pocket, even when it's not there. Get your questions in to 2101 or [email protected]