What’s the link, if any, between a particular bacteria and colon cancer ? No one is quite sure at present, but two labs have now used new tools and research to find parallel evidence of massive amounts of bacteria involved with colon cancer cells. The how and why remain to be discovered. But simply knowing to ask the question is part of the battle. The larger story is here in the NYT, by science writer Gina Kolata. New tools do make a difference.