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History
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At the Origin of Animals: The Revolutionary Cambrian Fossil Record
The certain fossil record of animals begins around 540 million years ago, close to the base of the Cambrian Period. A series of extraordinary discoveries starting over 100 years ago with Walcott’s discovery of the Burgess Shale has accelerated in ...
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Metromedia Will Sell Its Cellular Units
ST. LOUIS — Southwestern Bell Corp. announced Monday that it is purchasing the cellular telephone and paging businesses of Metromedia for $1.65 billion.Southwestern Bell said the properties involved in the...