After three years without a single reported case of polio, India was declared free of polio. It’s been so long since polio was a epidemic in the United States &emdash;which goes a long to way to explaining our current anti-vaccination and anti-science culture&emdash; that is hard to grasp how monumental this news is for so many people. The BBC reports that there are only three countries left where polio is endemic: Pakistan, Afghanistan and Nigeria. Wired recently had an excellent long-form piece on the effort to eradicate polio from the planet.