Geoff Watts takes to the slopes to examine the science of one of the most dangerous events at this year's Winter Olympics in Salt Lake City. Dr Kristen Bromley is an engineer and member of the British skeleton bobsleigh team, an event that hasn't been seen at the Olympics since 1948. His PhD into the construction and aerodynamics of the skeleton sled has proved to be very useful.
Producer Alexandra Feachem. E-MAIL: scirad@bbc.co.uk