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		</div><p><a href="http://londonglossy.com/wp-content/uploads/2010/11/ball-bearings-used-for-stonehenge.jpg"><img class="alignnone size-full" title="It has been claimed that neolithic engineers may have used ball bearings to built Stonehenge" src="http://londonglossy.com/wp-content/uploads/2010/11/min-ball-bearings-used-for-stonehenge.jpg" alt="It has been claimed that neolithic engineers may have used ball bearings to built Stonehenge"/></a></p>
<p>Neolithic engineers may have used ball bearings in the construction of Stonehenge, it has been claimed.</p>
<p>The same technique that allows vehicles and machinery to run smoothly could have been used to transport the monument&#8217;s massive standing stones more than 4,000 years ago, according to a new theory.</p>
<p>Scientists showed how balls placed in grooved wooden tracks would have allowed the easy movement of stones weighing many tons.</p>
<p>No-one has yet successfully explained how the heavy slabs used to build Stonehenge were shifted from their quarries to Salisbury Plain in Wiltshire.</p>
<p>Some, the &#8220;bluestones&#8221;, weighed four tons each and were brought a distance of 150 miles from Pembrokeshire, Wales.</p>
<p>Attempts to re-enact transporting the blocks on wooden rollers or floating them on the sea have not proved convincing.</p>
<p>The hard surfaces and trenches needed when using rollers would also have left their mark on the landscape, but are missing.</p>
<p>Experts hit on the new idea after examining mysterious stone balls found near Stonehenge-like monuments in Aberdeenshire, Scotland.</p>
<p>About the size of a cricket ball, they are precisely fashioned to be within a millimetre of the same size. This suggests they were meant to be used together in some way rather than individually.</p>
<p>The Scottish stone circles are similar in form to Stonehenge, but contain some much larger stones. To test the theory, researchers from the University of Exeter constructed a model in which wooden balls were inserted into grooves dug out of timber planks.</p>
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