The Sphere

What is it?
Where did it come from?
http://news.blogs.cnn.com/2011/12/22/mysterious-metal-ball-from-space-falls-in-namibia/

I'll bet those "nipples" on each side are captured by cups with bearings and the sphere rotates along the line (vertical in photo) around it's circumference. It was probably dropped or fell from an aircraft. I'll bet someone will recognize it eventually. My best guess is it held/guided a weapon, maybe a missile.

George

I've been researching this and am now wondering if it's a SOFAR sphere. Intended to be dropped by pilots into the water, sink to 1km and implode, sending a signal in the underwater sound channel.

George

Looks like some kind of container for compressed air or oxygen or something like that, but could be about anything I guess.
Maybe it is an alien probe! 8O