Episode 3 of In Search of Giants: Dr Brian Cox takes us on a journey through the history of particle physics. In this episode we learn how Ernest Rutherford conducted a historical experiment that revealed that most of the mass of an atom is concentrated in a tiny nucleus made of protons and neutrons.

This film is part of a series originally broadcast on Teachers' TV (http://www.teachers.tv/video/23645).

The series was made with the support of The Science and Technology Facilities Council (www.scitech.ac.uk).

www.lhc.ac.uk - Official UK LHC website for public and schools.

www.particledetectives.net - School resources on the LHC, how science works and particle physics.

Films produced and directed by Alom Shaha (www.labreporter.com).

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