This Working Steam Engine Is the Size of an Apartment Block

The world's largest functioning triple-expansion steam engine is an unbelievably massive beast of a machine. For 77 years, the 62-foot-high engine—weighing in at 1,000 tons!—powered gigantic flywheels and crankshafts that pumped millions upon millions of gallons of water from west to north London. It was… » 7/31/14 2:38pm 7/31/14 2:38pm