I’m ever curious (and I forget things quickly), so I thought I’d
look up some information on string theory, but I got stuck in
the world of quarks (a quagmire of information), so string
theory will have to wait for another day… The following is what
I understood of the theory of quarks (illustration found Here):
Quarks — along with leptons (six of them: the electron, muon,
tau, and their associated neutrinos) — are thought to be the
elementary particles, the building blocks that matter is made
of. Quarks come in six flavors (three pairs): up and down, charm
and strange, and top and bottom. The flavor identifies the
quark’s properties (the different leptons are also referred to
as flavors, and the three types of lepton (with their associated
neutrino) are referred to as generations). Quarks are not
observed alone in nature: three quarks combine to make a baryon
(e.g.: protons and neutrons, which are built from up and down
quarks), and two quarks combine to create a meson (a quark-
antiquark pair that is unstabl