Millions of fish and marine wildlife are dying as a result of the massive oil spill off the Gulf Coast.

What if there were ways to lead fish away from such dangers and direct them to safer waters?  It might be possible with the leadership of remote-controlled fish-like robots.

In the first bit of optimistic news we've heard in a while about the tragic BP oil spill, a chemical engineer from the University of Pittsburgh has created a polymer-coated cotton filtration system that efficiently separates oil from water.