Little more than one hundred years ago, maps of the world still boasted white space: places where no human had ever trod. Within a few short decades the most hostile of the world's environments had all been conquered. Likewise, in the twentieth century, medicine transformed human life. Doctors took [...]

In anaesthetist Dr Kevin Fong's television programmes he has often demonstrated the impact of extremes on the human body by using his own body as a 'guinea pig'. So Dr Fong is well placed to share his experience of the sheer audacity of medical practice at extreme physiological limits, where human [...]