The shape of the house [fig i] is curious. What is the purpose of the hatch in the roof [a]? It already has a convenient ground-level front door [b]. Closer examination reveals the truth; the 'house' is in fact part of a larger structure, originally buried underground. The 'door'[b] and 'windows'[c] are the remains of connecting tunnels, and the hatch [a] was originally the only route to the outside world. This raises the interesting idea that there are parts of this underground complex still buried in the surounding landscape [d].

Indeed, the activity of the speaker command-and-control tubes [fig ii] shows that these parts are still operational, even this close to the (now sealed) breached tunnels.

Figure [iii] shows the probable arrangement of the 'house' as it would have appeared when operational.

Examining the technology of the interior of the house reveals a rail gun sufficiently powerful to throw the soft organic Teletubbies to an appreciable height through the roof hatch. The power it must be channeling in order to achieve this would have a spectacular effect on metallic payloads, allowing the installation to disable orbital platforms.

The theory that suggests itself, then, is that Teletubbieland is in fact part of a self-sustaining, self-maintaining underground complex, probably a bolthole from some war in our relatively near future. The house itself is an anti-satellite weapon, supplied with men and materiel via the now destroyed tunnel system. The nuclear winter brought about by the war for which the complex was built triggered off a premature ice- age, and the resulting glaciation stripped the surface clean of the remnants of industrial civilisation.

At what point and by what agent the complex was damaged, resulting in the Teletubbie house, is debateable. It's possible that it was glacial action, but the surrounding terrain is more reminiscent of a crater. I would suggest that Teletubbieland suffered a direct hit from some advanced weapon system. The dome is clearly of a tough bomb-proof material, and so survived. The tunnel system was considered less critical, and the sub-standard build quality resulted in its obliteration in the immediate vicinity of ground zero.