The doctor who dropped his trousers on top of the world
As part of the 2007 Caudwell Xtreme Everest expedition, the team planned to take blood on the summit of Everest. Unfortunetly due to adverse weather conditions, the team had to go down to the balcony
You can also listen to a Wellcome Collection podcast where Dan discusses the 2007 expedition and trying to get blood on the balcony of Everest.