BBCnews is carrying this article summarizing the startling discovery of a new sub-atomic particle that doesn't easily fit into any category described by the current standard model. Officially referred to with the inelegant moniker "X(3872)", it has recently been dubbed the "mystery meson". Nearly as heavy as an entire atom of helium, it does not match any of the expected quark-antiquark constructions for meson particles.

The sub-atomic world makes my head hurt. I think I'll go lie down now...