10 Most Puzzling Ancient Artifacts

I decided to use Stumble tonight to see if I could find something interesting. It took me to AncientX.com with an article about "The 10 Most Puzzling Ancient Artifacts." Grooved spheres in Precambrian rock (2.8 billion years old), complex gears dating back to 80 BC which weren't rediscovered until 1575, a 500,000 geode with a porcelain object with a metal shaft similar to a sparkplug . . .

Intriguing . . .