What is the third law of thermodynamics? Dr Valeska Ting completes her series of films on the four laws, explaining the relationship between entropy, temperature and absolute zero. This is number 19 of our thermodynamics advent calendar. Catch up here: http://www.rigb.org/christmas-lectures/supercharged-fuelling-the-future/thermodynamics-2016-advent-calendar?utm_source=facebook&utm_medium=social&utm_campaign=201612_channel_advent | Royal Institution of Great Britain