Vaccination programs have helped to eradicate polio in nearly all countries. (The United States has been free of the disease since 1979.) While transmission of the disease can still be found in three countries, Nigeria, included on that short list, could soon be declared polio-free. And a new study explains how crazy longhorn ants work together to move large objects without getting lost. Science journalist Brooke Borel, of Popular Science
and the blog Our Modern Plagues
, discusses these and other science stories in the news this week.