Monthly Archives: June 2009

The Puerto Rico quarter is the second in the 2009 District of Columbia and U.S. Territories Quarters Program. Explorer Christopher Columbus arrived at Puerto Rico (“rich port”) in 1493, and it soon became a Spanish colony and important military outpost. … Continue reading →

Here’s something that people with poor or no vision will be excited about: three patients had their sight restored in less than a month by contact lenses cultured with stem cells. All three patients were blind in one eye. The … Continue reading →