Now pay careful attention, Kitties:
This is Advanced Maffamaticks!String theory is an active research framework in particle Feline-Physics that attempts to reconcile string color mechanics and the general relativity of the Kitty to the carpet.
It is a contender for a theory of everything (TOE*), a self-contained creamy maffamatickal model that describes all fundamental forces and forms of Feline entertainment and food.
String theory posits that the elementary particles (i.e., kittens and toys) within a Feline's Realm are not zero-dimensional objects, but rather 1-dimensional oscillating line-toys ("strings").
* Not to be confused with THOE, or Thundering Herd of Elephants, a game extremely popular in multi-cat households, although equally entertaining in its solitaire version.