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Pre Historic Puzzles: Rocking the Cradle of Civilization For more than a century, archeologists were convincing that the cradle of civilization lay in Greece, Egypt, and Mesopotamia. The learning of the advanced peoples of this region, it was thought, gradually moved west into Europe. But in the last few decades these theories have been overturned, thanks to Nobel Prize-winning physicist Willard F. Libby and a substance knows as carbon 14. Carbon 14 is a radioactive substance that exists in minute quantities. In the late 1940's Libby discovered that all plants and animals absorb it. When they die, the carbon-like all radioactive substances-begins to decay at a regular rate. Libby was able to measure this rate and could thus use carbon 14 as an archeological calendar. Today it is known that half of the carbon 14 in living organism disappears in 5,730 years, half of what remains in an additional 5,730 years, and so on. How old is old? Many of the items found at prehistoric sites are made of organic material. By measuring the amount of carbon 14 remaining in the shaft of an old ax or a piece of pottery, for example, scientists can accurately determine its age. Radiocarbon dating has proved to be phenomenally accurate: it can date to within 100 years going back to 50,000 B.C. It is particularly useful on wood because it can be checked against Dendron-chronology, dating by tree rings. A new ring forms every year in the trunk of a tree as it grows: counting the number of rings enables one to determine the age of any tree. Where did civilization begin?

"Those who make peaceful evolution impossible make violent revolution inevitable."- John F. KennedyThere's one thing for sure: 2008 isn't anything like politics as usual.The corporate media (with their unerring eye for the obvious point) is fixated on the narrative that, for the first time ever, Americans will likely end this year with either a woman or a black man headed for the White House. Bloggers are telling stories from the front lines of primaries and caucuses that look like something from the early 60s - people lining up before dawn to vote in Manoa, Hawaii yesterday; a thousand black college students in Prairie View, Texas marching 10 miles to cast their early votes in the face of a county that tried to disenfranchise them. In recent months, we've also been gobstopped by the sheer passion of the insurgent campaigns of both Barack Obama and Ron Paul, both of whom brought millions of new voters into the conversation - and with them, a sharp critique of the status quo and a new energy that's agitating toward deep structural change.There's something implacable, earnest, and righteously angry in the air. And it raises all kinds of questions for burned-out Boomers and jaded Gen Xers who've been ground down to the stump by the mostly losing battles of the past 30 years. Can it be - at long last - that Americans have, simply, had enough? Are we, finally, stepping out to take back our government - and with it, control of our own future? Is this simply a shifting political season - the kind we get every 20 to 30 years - or is there something deeper going on here? Do we dare to raise our hopes that this time, we're going to finally win a few? Just how ready is this country for big, serious, forward-looking change?Recently, I came across a pocket of sociological research that suggested a tantalizing answer to these questions - and also that America may be far more ready for far more change than anyone really believes is possible at this moment. In fac

That same evening, Bertha Day, the abbey's catering manager, also heard the singing. "I knew that Mrs. Mears, a local lady, had died," she said. Later both Sedgwick and Mrs. Day realized that they had heard the monks of Beaulieu Abbey singing a mass - their custom when one of the inhabitants of the nearby village had died. But no monks had lived in Beaulieu Abbey since 1538.