It's called MAN Takraf RB293 and it's the largest terrestrial vehicle in human history ,making the huge NASA Crawler that transports space shuttles to the launch pads look like a Volkswagen Beetle.
Bucket-wheel excavators are heavy machines used in the mining industry and civil engineering. They are also some of the largest vehicles ever built.
"A good scientist is a person with original ideas. A good engineer is a
person who makes a design that works with as few original ideas as
possible" - Freeman Dyson