the business end of that supersized earth moving scooping machine

I have had this image too long to remember where I got it from... yeah a couple days and I've went through too many sites to find anything... but it's better to share and not remember the source than to toss it due to lack of credit, right?

What is this machine? The Krupp giant bucket wheel excavator "Bagger 288" seen in this gallery http://www.darkroastedblend.com/2006/11/biggest-and-hungriest-machines.html
or even better for a more science orientated webpage: http://www.worsleyschool.net/science/files/extreme/excavators.html