1. Reverse osmosis: as the water from Swallowhead Springs induces the pukes & shits and the Winterbournes dry up, a reservoir was dug, but this didn't hold enough water for the annual FA cup final held at Avebury, so a bigger reservoir was built, it was during this process that water was noticed to be springing up and filtered by the chalk, so a huge water filter was built so there was plenty of water and the world cups could be held at Avebury, only a new B&Q opened at Stonehenge with bluestone decking so everyone left and then the Romans took it over as a spa resort with water skiing pulled by chariots.

2. Slime : it is meaningless residue and academics that managed to foist an unnecessary tunnelling job on a precious ancient monument deeply loved by the public will have eternal reputations assured and numerous PhD's will be produced about it that no-one will ever read.

As I say, they are just ill informed theories.

VBB :o)