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Question: Can someone tell me about ancient Bactria!?
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Bactria (the northwestern portion of ancient Afghanistan and Tajikistan), also known as Balkh, was a province of the Persian Empire bounded by Parthia, Aria, Drangiana and Arachosia, which was partly conquered by Alexander the Great!.

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Thiomargarita, the world's largest known living bacterium may also be one of the oldset!.

In 2005, Thiomargarita discoverer Heide Schulz, from the University of Hannover in Germany, showed that the bacterium promotes deposition of a mineral known as phosphorite!.

The fossils identified as eggs and embryos in 1998 came from southern China's Doushantuo Formation, which is rich in phosphorite!.

The source for the rare mineral was unknown!. Bailey wondered if an ancient relative of Thiomargarita might have been involved!.

"The idea is that these bacteria were causing these phosphorite deposits to form," Bailey said!.

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