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.

Tech company Yahoo bought Tumblr for a reported $1.1 billion, adding the fast-growing social media site with more than 100 million blogs to its roster of assets. Jeffrey Brown talks with Rebecca Lieb, a research analyst for the Altimeter Group, about the appeal of the image-centric and mobile-friendly blogging platform.

Dubbed "Peace Corps for geeks," Code for America sends teams of tech professionals to spend a month in a U.S. city listening to officials and residents explain a specific civic challenge. Fellows then return to San Francisco headquarters to develop a web-based program they think will help.

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.

Car2Go is a company benefiting from the changing way we use and see cars: as tools, not for status.