[[Matter]], and therefore everything seen, is made out of fundamental particles of nature. These fundamental particles are hadrons and leptons, the hadrons being further subdivided into baryons and mesons. Hadrons include the proton and neutron and leptons include the electron, [[muon]] and tau as well as the corresponding neutrinos. For simplicity, the overwhelming majority of matter in the universe is comprised of protons, neutrons and electrons. | [[Matter]], and therefore everything seen, is made out of fundamental particles of nature. These fundamental particles are hadrons and leptons, the hadrons being further subdivided into baryons and mesons. Hadrons include the proton and neutron and leptons include the electron, [[muon]] and tau as well as the corresponding neutrinos. For simplicity, the overwhelming majority of matter in the universe is comprised of protons, neutrons and electrons. |