Down and down I went, into a concrete stairwell, four-and-a-half flights below ground. The sunlit sky above soon became a miniature rectangle over me, until I stood facing a steel blue door. Down and down I went, into a concrete stairwell, four-and-a-half flights below ground. The sunlit sky above soon became a miniature rectangle over me, until I stood facing a steel blue door.
Terrifying reality of what modern life does to your body – as exposed by an extreme experiment that will change the way you live
