Before revision: 19 Atom Smasher The Large Hadron Collider at CERN near Geneva, Switzerland 2008-07-31 on NGC (UK & IE) 21 Ultimate Sub (Super Sub) () in the U.S. Navy ?
After revision: 20 Megabridges: China Lupu Bridge in Shanghai, Runyang Bridge in Jiangsu Province, and Sutong Bridge near Suzhou 2006-07-1119 Atom Smasher The Large Hadron Collider at CERN near Geneva, Switzerland 2008-07-31 on NGC (UK & IE) 21 Ultimate Sub (Super Sub) () in the U.S. Navy ?