Who would have thought that something as harmful as a cigarette butt could have a beneficial use? It turns out that birds are smarter than we think. They've discovered a clever way to protect their nests from pesky parasites. The nicotine and other chemicals found in cigarette filters act as a natural pesticide, keeping unwanted critters at bay. By incorporating … [Read more...] about Bird Brains: A Surprising Use for Cigarette Butts