The tombs were called Polish pyramids or the beds of giants, according to the Facebook post, and were created by members of ...

Archaeologists in Poland have unearthed 5,500-year-old megalithic tombs, dubbed the "Polish pyramids," in the Wielkopolska ...

Archaeologists in Poland uncovered 5,500-year-old mounds, dubbed “Polish pyramids,” containing ancient tombs from an early ...

“Bille” is the first-ever monostable tetrahedron, or a pyramid-like shape with four triangular faces that has one stable ...