A cluster of 41 stone circles near Fredrikstad in southeast Norway puzzled a team of archaeologists upon the initial discovery. What they found under the circles didn’t help solve any mysteries.

Last year, a team from Norway's Museum of Cultural History found dozens of circles made of meticulously placed stones in the city of Fredrikstad. Beneath the stones, the archaeologists found ...

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Archaeologists from Norway's Museum of Cultural History were utterly "mystified" when they first came across the stone circles at a site in Fredrikstad, around 50 south of Oslo last autumn ...