Carboniferous era plants set for video game-type isometric swamp scene. Simplified plants included ferns, horsetails (Equisetum), the extinct Calamites, and prehistoric Sigillaria tree. Royalty-free ...

A huge 4,000-year-old Bronze Age hexagonal pyramidal structure has been discovered in Kazakhstan, which is apparently the first pyramidal structure ever discovered on the Eurasian steppes.

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Nearly 700 miles from the Saudi Arabian capital of Riyadh lies AlUla, a lush oasis valley enshrined by towering sandstone mountains.