Not very long ago, I posted a youtube video of ferro magnetic fluids in action. I thought it was an amazing, cool, and new idea. Well over the course of a couple weeks I kept hearing references to ferro fluids. One such reference was when looking into the Future Warrior project from DARPA. It was suggested that ferro magnetic fluids would make it possible to have an advanced type of anti-ballistic body armor. The body armor would remain soft until a magnetic field was applied, thereby making it rigid and 'bullet proof'. A few days later I heard about a not so dramatic use of the material - automotive shock absorbers. So I got to looking up some bona-fide information on the subject.