Six human species used to inhabit the earth, now there is just one. How did Homo Sapiens become the dominant species and what would the world have looked like if other species had survived?

Hay Levels are 3 minute films from some of the world's greatest writers and thinkers. So if you want to know about the Big Bang, the Great War or the Quick Thaw; if you want some new ideas on Frankenstein or Immunity or Globalisation; on sex, or war or money...welcome to the Hay Levels. The Hay Levels project is supported by our partners, the Tata group.