The Maus was an experimental German super heavy tank designed in 1942. The Maus was, adequately, named The Mammut (mammoth in German) before its name changed to Mäuschen (little mouse) in December of 1942 and ultimately Maus in February of 1943. Weighing in at 188 tons it was simply too large for most infrastructure of its time. Finding a drive train that was small enough to fit inside while still being powerful enough to propel the tank was near impossible. Ultimately they tried using a combustion engine to power an electrical generator but did not have the equipment or time to finish the final product. Only 2 prototypes were made and both were damaged while the Germans retreated in an attempt to stop allies from finding it. Even though they were damaged, the two prototypes were found and restored enough to be shown in an exhibit near Moscow, Russia. The turret of one was placed on the hull of the other making it the only remaining Maus. The Maus was too large at 33 feet and 6 inches with 170-220 mm of steel around the entire tank and two main cannons so it simply weighed too much. The Maus, much like many other German WWII designs, was simply too much sometimes the simple but effective options just work better.