They Built This 5,000 Years Ago... And It Still Works

Hidden in Ireland is Newgrange, a 5,000-year-old monument built centuries before Stonehenge and the Great Pyramids. Every winter solstice, the rising sun shines through a tiny roof box, illuminating the inner chamber with astonishing precision. No modern tools. No computers. Just incredible engineering that still works today.

Was it a tomb, a temple, or something far more mysterious?

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