[math-fun] Kazakhstan "geoglyphs"

Patterns, such as swastika-like shapes (3-symmetric, though, not the nazi 4-symmetric version), dotted lines, etc were carved into the steppe in Kazakhstan around 8000 years ago out of giant earth mounds. The largest are about 1/4 mile in diameter, the smallest only about 100 meters. There are about 260 in all. They were spotted by Kazakh hobbyist Dimitriy Dey in 2007 using "google earth". Here's some news stories about that including pictures released by NASA. http://www.independent.co.uk/news/science/nasa-puzzled-by-huge-8000-year-old... http://www.dailymail.co.uk/sciencetech/article-3297282/Mystery-ancient-patte... -- Warren D. Smith http://RangeVoting.org <-- add your endorsement (by clicking "endorse" as 1st step)