In 1923, famed British geologist Herbert Henry Thomas published a seminal study on Stonehenge, claiming to have found the precise spots where prehistoric people had quarried the stones. There was just one problem with his analysis: It was wrong. And it has taken geologists about 80 years to get it right, a new study finds. To debunk Thomas' work, Bevins and Ixer donned their Sherlock Holmes hats and examined Thomas' maps and rock samples. Thomas (1876-1935) was a geologist for the British Geological Survey who spent just one day in December 1906 surveying Mynydd Preseli... During his Preseli Hills visit,...