In Photos: The Secrets of Everything Exploring questions like whether you could survive a falling lift or why the sky is blue. of 6 Asteroid Impact Greg Foot tries to work out whether we could survive an asteroid impact. London Lido Greg Foot at a London Lido about to discover whether we can survive extreme cold. Spartan Race Greg Foot after he had completed the Spartan Race to burn off calories after hed eaten lots of fast food. Greg and Dr Zbigniew Greg Foot with chemist, Dr Zbigniew Szydlo known as Doc, in his workshop . Human Flesh Greg Foot wonders what humans taste of. Experimenting with Fire Greg Foot experiments with fire to discover why its hot. Slideshow Pause Show Images Hide Images Tweet