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A fleet of Google's robotic cars has been tested more than 200,000 miles over highways and city streets. And Nevada has finalized rules that give special driving permits to the self-driving cars.

In his book Concrete Planet, author Robert Courland discusses why the concrete first used by the Romans is more durable than the concrete used in most present day buildings. Plus, mineralogist Peter Stemmerman tells us about his invention, Celitement and why it is greener than Portland cement.

Duke biologist Sarah Zylinski wants to better understand how cuttlefish see the world. Like their relatives octopus and squid, cuttlefish are master camouflagers--and Zylinski says you can learn something about how they process visual information by testing how they change their skin patterns in relation to different backgrounds.

Linguist David Harrison has travelled to remote corners of the world seeking the last speakers of endangered languages. Now, he's using digital tools to to record and revitalize these dying languages. At the AAAS meeting this week, Harrison unveiled 'talking dictionaries' for eight languages.

The man was under FBI surveillance and police say he was planning to bomb the U.S. Capitol in a suicide attack.

The WHO upheld its guidelines on the safety of hormone injections for contraception yesterday, despite some data that users are at increased risk of HIV transmission. An expert panel says the evidence isn't solid yet, and at-risk couples should use a second method, like condoms, for HIV prevention.

For 40 years, under the iron fist of Moammar Gadhafi, celebrations were tightly controlled. So, now that Libyans are free, they're just winging it.

Belmont Abbey College alleges that rules requiring no-cost contraceptive coverage for women violate its Catholic mission. The administration has countered that the college's health plan isn't affected by the health law anyway.

The men's basketball team at Jeremy Lin's alma mater, Harvard University, is making its mark on the national scene — and benefiting from powerful Ivy League recruiting tools: a stellar academic reputation and a big increase in financial aid.

The dominant role of Germany in the Greek bailout has triggered special venom in Greece. Melissa Block talks to Nikos Konstandaras, managing editor of the leading Greek daily Kathimerini, about the tensions between the Greeks and the Germans. He says Greek frustration with the demands of the European Union have spilled over into a war of words between some of his countrymen and some Germans, tapping the collective memory of the German occupation.