Brighton Stormwater Tunnel Boring Machine (TBM) cutterhead (1995)
 Detail of Brighton Stormwater TBM
 Electron analogy for  Quantum Physics in a Nutshell.  Electrons do not really exist between measurements. The analogy devised by Werner Heisenberg (1901–1976) was to be sitting in a park at night watching a person travel from one lamp post to anothe
 Detail of electron analogy for  Quantum Physics in a Nutshell .
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