Nasa puzzled by huge, 8,000-year-old mystery structures in Kazakhstan that resemble ancient crop circles Prison Planet.com Posted on November 2, 2015 Posted in Aggregated No Comments Tagged with Sci Tech London Independent | The structures could force a complete rethink of our understanding of early humanity, experts say Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email