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
http://www.imdb.com/title/tt0080801/
I don't have a guess as to what it could be, but Google Images seems to think it's a Cachorro Yorkshire Terrier, and that's good enough for me.
http://en.wikipedia.org/wiki/Russian_space_program
If you look at the middle of Vostok 1, you can see the smaller balls encircling it.
http://home.howstuffworks.com/home-improvement/plumbing/how-to-repair-a-toilet3.htm
http://www.flickr.com/photos/npdemers/4451626178/
Speaking of, the Doctor would know the answer :(
http://tardis.wikia.com/wiki/Genesis_Ark
"a giant metallic ball, 1.1 metre in diameter"
"The hollow ball with a circumference of 1.1 metres (43 inches)"
"With a diameter of 35 centimetres (14 inches)"
Somewhere, a geometry teacher is crying.
http://www.craigdailypress.com/photos/galleries/2011/apr/09/it-fell-sky/
http://fernlea.tripod.com/tank.html