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Stephen Hawking: Master of the Universe header image
Ask An Expert: Prof John Pethica

Professor John Pethica FRS
Professor John Pethica FRS is the Chief Scientific Adviser with NPL (National Physical Laboratory) and a Visiting Professor at Oxford University. He is also Research Professor at the School of Physics, Trinity College, Dublin.

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Master of the Universe: Video Clips
Watch Master of the Universe on 4oD
String Theory and how the universe works
Are we alone? Why are we here? Are we real?
Discover the truth behind time travel
Black holes, asteroid collision and much more...