Was Stonehenge built using carved wooden balls? Andrew Young, a student at Exeter University in the U.K. thinks so. Young notice carved stone balls near other Neolithic stone circles. Upon examination, he found that all of these stone balls were roughly the same shape and size – leading him to believe that they were designed to be used in unison with rails.
Young tested his theory, and found that he could personally move 220 pounds of concrete with just one finger while seven people could easily move 4 tons. He thinks that the largest of the Stonehenge pieces would have been moved using both oxen and people.