There are many other types of lightning that are not associated with storms, but the mechanism of a separation of positive and negative charges in the atmosphere still cause them. Some of the more common ones are St. Elmo's fire, air discharge, sprites, heat lightning, and ball lightning.
The world's largest steam shovel surviving intact is a Marion machine, dating from either 1906 or 1911, located in the small American town of Le Roy, New York. It was listed on the National Register of Historic Places in 2008.
Print This Article Tell A Friend List of All Stories in This Issue Â«Previous Article Next ArticleÂ». We received a lot of mail a few years ago when we stated that a South African-built 4-WD ACO tractor was the biggest in the world (Vol. 19, No. 4). Readers were quick to tell us about other tractors that have attempted to lay claim to the title, World's Biggest. One frequently mentioned candidate was Versatile's Big Roy, an 8-WD, 600 hp giant that was built as a prototype and is now on display at a farm museum in Manitoba.