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: Mining the Moon, the Gateway to Mars GOLDEN, COLORADO -- Any high hopes of sustaining expeditions on the Moon, Mars or beyond will depend on getting  quot;down and dirty quot; on those worlds -- in the form of using on-the-spot resources.

Sci/Tech