Question for October 28th

Hi,
I thought the order for posting was supposed to be Anshul, Ishani and then me, Dev and so on..... but somewhere along the line looks like something got messed up. Anyhow, decided to squeeze in a post :)

The exact origin of X is disputed. Its growth may be traced across three different North American countries, and Russia. In 2002, Tamás Vicsek of the Eotvos Lorand University, Hungary along with his colleagues analyzed 14 videos of X , developing a standard model of the behavior of X (published in the September 12 issue of Nature) . He noted that, once started, it usually rolls in a clockwise direction at a rate of about 12 m/s (40 ft/s).
It gained worldwide prominence, and its official name, during the 1986 FIFA Football World Cup.
Identify X.

Pinakin