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The tiny organism has an internal clock that triggers it to swim vigorously every 12.4 hours, coinciding with the changing tide — even when it's removed from its habitat.

From now on, the fast-food giant says, it will only market and promote milk, water or juice with its children's meals — though parents can still choose to order sodas for their children. The change comes as part of a larger plan to promote more healthful choices.

During a Senate Intelligence Committee hearing, NSA Director Gen. Keith Alexander would not say.

David Greene speaks to Sid Bream, the former Atlanta Braves player whose dramatic slide into home plate ended the Pittsburgh Pirates last playoff run in 1992. A Pennsylvania native and former Pirate, Bream is now cheering for the Pirates as they return to the post season for the first time in 21 years.

It's not just sports teams that win championships. It's also their fans who endure long seasons hanging on every pitch, touchdown or basket. David Greene finds out what it's like to be on the cusp of either a championship — or a disaster.

A study by an international panel of scientists shows that the researchers are confident about the links between human activity, global warming and climate change.

Microsoft's co-founder wishes Windows PCs had been given one start-up key instead of the famous three-key combination. But fans are both nostalgic about what was required and say it helped protect their PCs from some problems.

An all-digital public library is opening today, as officials in Bexar County, Texas, celebrate the opening of the BiblioTech library. The facility offers about 10,000 free e-books for the 1.7 million residents of the county, which includes San Antonio.

Famed fashion icons Bethann Hardison, Iman and Naomi Campbell have joined a coalition that presses for more diverse representation on the runway. The group has sent a letter to the governing bodies of the fashion world calling out specific designers for their lack of diversity.