Ever wondered what ice sounds like? It creaks and groans, explains Dr David Rippin from the University of York's Department of Environment and Geography. Large bodies of ice are depleting at an alarming rate as a result of climate change, but can anything be done to halt this process and protect what remains of this essential element of our environment? Dr Rippin talks us through his expeditions through the world of ice. Photo credit: Dr David Rippin http://www.photorippin.com/