Slicing ice with fingers- science experiement

This is a "cool" video.  It uses something called graphite which is a form of Carbon (an element). Carbon is also found in pencils.  This experiment uses a single layer of graphite called a Graphene. Graphene is good at conducting heat.  The heat from someones hand is transferred to the Graphene and is able to cute the ice.

http://www.sciencechannel.com/tv-shows/outrageous-acts-of-science/videos/slicing-ice-with-your-fingers/