Example image of eyePlorer eyePlorer map for 'Point particle': Physics Dimension Extension Charge Mass Inverse-square law Electromagnetism Field (physics) Newton's law of universal gravitation Elementary particle Particle physics Lepton Quark Standard Model Vector boson Atom Democritus George Johnstone Stoney Ionization Electron Electric charge Gas J. J. Thomson Matter George Zweig Murray Gell-Mann Deep inelastic scattering SLAC National Accelerator Laboratory Neutron Proton Element Universe Hadron Conservation law Mass–energy equivalence Spin (physics) Nucleon Bottom quark Charm quark Flavour (particle physics) Strange quark Top quark Down quark Up quark Weak interaction Particle decay Baryon Meson 2003 Pentaquark