Around 40 standing stones thought to have been erected by prehistoric humans 7,000 years ago have been destroyed near a famed archaeological site in northwest France to make way for a DIY store, an angry local historian has revealed.The stones in Carnac were between 50-100 centimetres (20-40 inches) high and stood close to the main highly protected areas of one of Europe's largest and most mysterious pre-historic tourist attractions...He believes 39 standing stones -- known as menhirs -- have been lost, estimating their age to be around 7,000 years based on carbon dating conducted on stones nearby in 2010.The land...