When it comes to useful machines, it’s clear that they are getting bigger and bigger… You should check out the video below that presents the world’s five biggest machines in action. The first is the Bagger 293, known as the MAN TAKRAF RB293 – a giant bucket–wheel excavator made by the German industrial company TAKRAF. The second one is the massive tunnel boring machine! And here are the crawler-transporters – a pair of tracked vehicles used to transport spacecraft from NASA’s Vehicle Assembly Building along the Crawlerway to Launch Complex 39. Other big machine is the Komatsu 930E – an off-highway, ultra class, rigid frame, two-axle, diesel/AC electric powertrain haul truck. The last one is the Bridge girder erection Machine- SLJ900.