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The chemistry of dozens of streams and rivers across the U.S. is changing. Waters are becoming more alkaline — the opposite of acidic. And the reason is counterintuitive — researchers believe that acid rain is to blame.

Jews across the world are sitting down to a big meal before Friday's Yom Kippur fast. And many of them are eating kreplach. Some say these strange-sounding-yet-good-tasting dumplings are a holiday meditation on our inner and outer selves. Or maybe they're just a delicious example of the peasant cooking of Eastern Europeans.

Dolby, who invented some of the technologies that revolutionized film and sound recording, was instrumental in developing surround sound technology. Dolby had been living with Alzheimer's and was diagnosed with leukemia this summer.

Twitter announced via Tweet Thursday that it's launching its long awaited initial public offering. It will be the most high profile IPO since Facebook went public last year. But Twitter hopes to avoid the mishaps that's marred Facebook's stock market debut.

The Obama administration's decision not to challenge pot legalization in Washington and Colorado is reverberating in states where regulation of medical marijuana has been scant.

Men's Wearhouse stocks are down 10 percent, CEO Doug Ewert thinks he knows the reason why. The fear of the number 13. He blames superstitious brides for postponing their weddings to avoid 2013.

The tech industry's sometimes sexist "brogrammer" culture came into focus this week, when an offensive app was presented at an industry hackathon. So we asked developers, community leaders and others in the tech sphere to share their ideas for addressing the industry's cultural schism.

Back in 1984, technology leader Nicholas Negroponte was able to predict, with surprising accuracy, e-readers, face to face teleconferencing and the touchscreen interface of the iPhone.

Twice in recent decades more accurate measurements have led experts to say North America's tallest peak is shorter than they thought. It's still No. 1 on the continent, though.