President Barack Obama announced he would posthumously award the Presidential Medal of Freedom to Sally Ride, the first woman in space. NewsHour's science correspondent Miles O'Brien reflects on Ride's legacy and her impact as an educator who encouraged young women to study science, technology, engineering and math.

Social networking websites such as Facebook and Twitter helps users mobilize around a common cause. But what if their message is one of hate? The Simon Wiesenthal Center, a group working against global racism, has compiled a list of hundreds of websites it deems hateful and is pushing their host sites to remove them.

Yahoo, the languishing tech pioneer, officially unveiled its acquisition of social blogging platform Tumblr on Monday. The $1.1 billion purchase by Yahoo could mean a whole world of things for both of the Internet companies, as well as for Yahoo chief executive -- and former Google executive -- Marissa Mayer.

Code for America, a San Francisco nonprofit, enlists high tech professionals to work with local governments to create tools to help average citizens tackle hunger, blight and other civic problems. NewsHour correspondent Spencer Michels reports.

Last week, the Smithsonian unveiled the first known recordings of Alexander Graham Bell's voice.

The developers of a building billed as the world's "greenest" hope to inspire similar projects.

As newspapers cut staff and trim pages, the Internet is finally finding room for long-form content.

Think you could inspire a movie? Director Ron Howard has a few short films he'd like your help with.