Из какого учебника по английскому эта страница?

stonehenge is one of the major tourist attractions in the united kingdom. stonehengehas a good chance to share the fate of the planet earth from the book "the hitchhiker’s guide to the galaxy" by douglas adams.

an underground highway will be built right under the ancient pagan ruins.

stonehengemay indeed disappear and this is not a science fiction or subtle british humor . my name is alex, and i am one of the participants stonehenge  experiment.

and we'll try to understand the mysteries of the monument which was erected at the dawn of humanity. we hope that it isn't too late to understand it. the earliest surviving places of worship of the stonehenge look very primitive and don't resemble stone buildings which were built much later.

stonehenge was built no earlier than 3100 bc, and it   was two round mound of earth,   between which there was a moat. the diameter of the object was nearly 115 meters. i think that the ditch between the shafts was built with tools made of deer antlers. the work hadn't been done all at once, but it   had been done  by piecemeal.

we found shovels and began to work.

according to our calculations   it might take about 2 million man-hours (или просто man, а то получается руссицизм) of work to make  the construction ofstonehenge.

  and also it might take  10 times more time to process the stones.

people had been working for almost 20 centuries to build  this monument.

there is one of the most true version of the construction of stonehenge. it is the theory that   peoples living in the late stone age   began to build  this construction.(вот это предложение не уверена) and people of new economic sistem only continued this work.