Definition: In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].
Input: Biggest Collision in the Universe Summary - (Sep 24, 2004) An international team of scientists have discovered one of the most powerful events since the Big Bang: a collision between two galaxy clusters, which is smashing millions of stars into each other.

Sci/Tech