March 14 is Pi Day, which celebrates the mathematical constant measuring the ratio of a circle's circumference to its diameter (beginning with 3.14). Pi Day is celebrated internationally, and in 2009 it was decreed an official holiday by the US House of Representatives. Here are 3.14 ways to celebrate.
President Obama's selection of nuclear physicist Ernest Moniz as Energy secretary highlights a void in Washington. The nation's capital lacks scientists in key decisionmaking positions and in Congress.