In the early 1960s, three groups of physicists, working independently in different countries, stumbled upon an idea that would change physics and fuel the imagination of scientists for decades. That idea was the 'God particle', or Higgs boson - to find it would be to finally understand the origins of mass - the last building block of life itself.
Ian Sample is an award-winning science correspondent at the Guardian newspaper. He was named investigative journalist of the year in 2005 by the Association of British Science Writers and was previously a feature writer for New Scientist. He holds a PhD in biomedical science from Queen Mary, University of London. Born in Oxfordshire, he now lives in London.