* Astronomy

From the air, its hidden tree-covered slopes give little clue to the settlement that existed there 3,000 years ago.
And its position in one of the quietest corners of the nation may seem a million miles away from the bustle of todays towns and cities.
But historians have now described an ancient Iron Age hillfort in Mid Wales as the "Millennium Stadium of its day", after computer modelling revealed its true scale.

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