Traffic jams move backwards on roads in a wave like pattern and their not entirely random nature offers a glimpse into predicting future patterns. Watch the full fourth lecture of the series: http://www.rigb.org/christmas-lectures/watch/1999/arrows-of-time/the-quantum-leap?utm_source=youtube&utm_medium=social&utm_term=description From the fabric of space-time to the limits of the quantum world, Neil Johnson takes us on a journey through time in his 1999 Christmas Lecture series "Arrows of Time". In the fourth lecture, where this clips is from, Neil Johnson delves into the world of quantum physics and explores some of its applications. Watch the full series: http://www.rigb.org/christmas-lectures/watch/1999/arrows-of-time The Ri is on Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy