In the past, many particles that were once thought to be elementary such as protons, neutrons, pions, and kaons have turned out to be composite particles.
Photons, perhaps they are made of neutrinos?
Science is more than what we presently know, certainly more than what was taught. Usually science becomes established in what was once theorized. If my memory serves me right... ah, found it... from 1936
Prologue 1936 On a Relativistically Invariant Formulation of the Neutrino Theory of Light
http://www.sciencedirect.com/science/article/pii/S0031891436803401 The neutrino theory of light, as developed by Jordan and Kronig, is given a relativistically invariant formulation by describing the neutrino field in terms of wave functions obeying Dirac's equation, the electromagnetic field on the other hand in terms of the six-vector E, H, and by expressing the Fourier coefficients of E and H as functions of the amplitudes of the neutrino field. Upon subjecting the latter to the commutation relations characteristic of particles satisfying Pauli's exclusion principle, there result for E and H the well-known commutation relations of the electromagnetic field vectors. The new view-point has as a consequence that in the formalism, previously developed by Jordan and Kronig, the two components of the wave function associated with the neutrinos must be considered as referring to states with positive and negative energy rather than to states differing by the orientation of the neutrino spin; a conclusion also arrived at recently by Born and Nagendra Nath. Problems with the neutrino theory of light. Although composite photons satisfy many properties of real photons, there are major problems with this theory. This gentleman proposes moving it forward along certain lines of thought.
Speculations on the Neutrino Theory of Light
http://www.researchgate.net/publication/2179665_Speculations_on_the_Neutrino_Theory_of_Light
Electron Splits into Quasiparticles http://www.scientificamerican.com/article/electron-splits-into-quasiparticles/
The achievement could help to resolve a long-standing mystery about the origin of high-temperature superconductivity, and aid in the construction of quantum computers.
Not-quite-so Elementary, my Dear Electron http://www.nature.com/news/not-quite-so-elementary-my-dear-electron-1.10471#/ref-link-4
Fundamental particle ‘splits’ into quasiparticles, including the new ‘orbiton’. Focus: Two Photons Diverged
http://physics.aps.org/story/v10/st3 Researchers have detected rare instances of photons splitting in two. Experimental Investigation of High-Energy Photon Splitting in Atomic Fieldshttp://journals.aps.org/prl/abstract/10.1103/PhysRevLett.89.061802 Seeing double. Researchers have caught glimpses of a rare event in which a single photon splits in two. This calorimeter, which contains 400 kg of liquid krypton, detected the photon pairs. If a fat man walked into an empty room and then two skinny guys walked out, you might be perplexed. Now physicists have spotted the equivalent result in photons flying near an atom. A group publishing in the 5 August print issue of PRL has identified rare instances in which a single photon splits in two, dividing the original photon’s energy between them. Fundamental particles constantly and randomly morph into “virtual” particles. A photon, for example, can temporarily become an electron and positron which quickly annihilate one another to reform the original photon. In a vacuum the process has little effect, but the electric field of an atom can interact with electron-positron pairs to create theoretically measurable results, some of which have already been fingered