Almost 1.9 million sunsets since Newgrange was built

Almost one million, nine hundred thousand sunsets. If we take the date of 3150BC for the construction of Newgrange (which is the date favoured by archaeologists), then tonight's sunset in the Boyne Valley (pictured) would be the 1,886,632nd sunset since this great monument was built in the distant New Stone Age. Also pictured, directly under the setting sun, is a satellite mound known only as Mound B.

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