Who Crafted the 2.8 Billion-Year-Old Klerksdorp Spheres?

2.8 Billion-Year-Old Spheres balanced within one-hundred thousandths of an inch from absolute perfection have created confusion among experts. They vary in size from 30 – 50 mm in diameter and have perfectly concentric grooves around the center as if they were molded. Inside the hard “shell” some have a spongy substance, while in others it […]