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: Science pinpoints Earth #39;s  #39;hum #39; Scientists believe they have pinpointed the origin of a low frequency  quot;hum quot; that emanates from the Earth. The noise - which can be picked up in the two and seven mHz (millihertz) range - occurs far below the 

Sci/Tech