G Geek Active member Mar 29, 2010 #1 People believe that cycles were invented in the 19th century in Europe. Historian Xu Quan Long disagrees. He says cycles were invented 2,500 years ago, and he built this fully functional tricycle to prove it. More »
People believe that cycles were invented in the 19th century in Europe. Historian Xu Quan Long disagrees. He says cycles were invented 2,500 years ago, and he built this fully functional tricycle to prove it. More »
