An exon (from Latin prefix ex-, "outside", a reference to the fact that it's "outside" of our current Standard Model), also called a "warp particle" or an "odd particle", is a type of subatomic particle that has negative mass. Exons are commonly used in warp drives due to their negative mass. The opposite of an exon is a theton (i.e. the stuff we're all made of). Unlike thetons, exons cannot form into larger particles due to the fact that they have a negative mass.

Exons are naturally occurring, but are very rare and must be generated artificially as a result.


Exons, other than having negative mass (and therefore negative energy), have no other defining properties (such as spin or charge) that separate them from thetons. An interesting side effect of their negative mass, however, is that when an exon and a theton of equivalent mass come into contact, their opposite energies cancel each other out, resulting in both particles (seemingly) disappearing into thin air without a trace. This makes them just as, if not more, dangerous than antimatter (because it does the same thing, albeit silently).


Exons, like thetons, have many types, which include quarks, bosons and leptons, as well as hadrons and mesons.

Elementary particles


Up Strange Top
Top Ex-up Ex-strange Ex-top
Bottom Ex-down Ex-charm Ex-bottom




Electron Ex-electron Ex-muon Ex-tau
Neutrino Electron ex-neutrino Muon ex-neutrino Tau ex-neutrino


The photon and gluon have no exon counterparts, as both bosons are inherently massless. However, the other gauge bosons, the W and Z bosons, have exon counterparts, which are called the XW and XZ bosons.

The Higgs Boson also has an exon counterpart, called the Ex-Higgs.

Composite particles

Hadrons, or any composite particles for that matter (heh), cannot form because the negative mass of the elementary particles pushes them away from each other.

History and discovery

Exons, up until 30 000 years ago, were used by the Forerunners as a fuel for warp drives and portal technology. When they left, they placed a huge subterranean library called the Obelisk Library on Mars, which contained every piece of literature (including poems, patents, novels etc.) and every audio file (including music and language recordings) produced by the Forerunners during their recorded history. Among the entries in this vast library was a digital blueprint for a warp drive, discovered and deciphered by Alec Feist in 1993.

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