For a few days, people living in a remote area of Namibia heard strange explosions. Then they found this sphere, which is about 14 inches in diameter, in an impact crater about 12 feet across. What is it for? Who does it belong to? So far, it has yet to extinguish all life on earth, but puzzled authorities are investigating. In the comments, write your own hypotheses about the origins and purposes of this sphere.
Link -via Popular Science | Photo: National Forensic Science Institute