Biologist David M. Graber of the U.S. National Park Services calls human beings a ???cancer???; in the same article, he goes on to say: ???I know social scientists who remind me that people are part of nature, but it isn???t true ???Until such time as Homo sapiens should decide to return to nature, some of us can only hope for the right virus to come along.??? (???Mother Nature as a Hothouse Flowe