Now, imagine that the particles are like the "20 questions" player whose object is sometimes a donkey and sometimes a horse, with a fixed rule deciding when to answer with which animal.

But hey, if particle physicists get this one down, the next LHC could pay for itself.

One particle comes to you and the other comes to you.

If it exists, it could explain literally everything in the universe - from subatomic particles to the laws of speed and gravity.

This equation is of some value for describing particles without spin - certain kinds of mesons - but does not apply at all to the electron.