Archaeologists claim to have discovered palace of Genghis Khan in Mongolia, Bacon sandwich really does cure a hangover, Batteries grown from 'armour-plated' viruses, Tiny rock excites astrochemists, The Revenge of the Fighting Quaker, The first credit card was issued in 1951, First submarine designed in 1578, NASA's early lunar images, in a new light, 10 Old Wives' Tales Debunked, Otherworldly Scenes Found on Seafloor, Scientists explain why scratching helps relieve an itch.