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: Spirit captures some evidence that underground source created rock &lt;b&gt;...&lt;/b&gt; NASA #39;s older Martian robotic rover, Spirit, has found evidence that underground water changed a major rock formation called the Columbia Hills, scientists said Thursday.

Sci/Tech