大象传媒

We hear from British surgeon Dr David Nott who has volunteered in war zones around the world for the last two decades. He tells us the conflict in Syria is the most brutal he has experienced. Dr Nott has travelled all over the world to Bosnia, Chad, Iraq and Libya - and he tells us what motivates him to give up his holidays to offer help. We hear from doctors working in ebola clinics and aid workers around the world who have who given up their Christmas to work overseas. Plus we find out the science behind Santa's epic Christmas journey.