* Astronomy

Porthmadog marks the 200th anniversary of its 'Cob'

Celebrations are under way in Porthmadog for the 200th anniversary of the man-made structure which allowed the Gwynedd town to be built.
It was William Alexander Madocks' vision to build the Cob embankment to reclaim hundreds of acres of good farmland which lay below sea level.
But the structure also allowed the town of Porthmadog to be built around a thriving harbour exporting Welsh slate.
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