Most spiral galaxies, including our home galaxy the Milky Way, have a large concentration of ancient stars surrounding the centre that astronomers call the bulge.

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Cattle browsed in the grass, and the distinctive call of a sandhill crane carried on the wind that flowed down from ancient sand dunes in the distance.

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"We thought for a long time about what to call the exhibit, " explained Ralf Wartke, deputy director of the Museum of the Ancient Near East, whose collection is housed in the Pergamon.

WSJ: The Ur-Metropolis | Uruk | Pergamon Museum | By A.J. Goldmann