Mars meteorite 1st look at Red Planet's ancient crust

In the article "Mars meteorite 1st look at Red Planet's ancient crust" by Fox news. They found a rock that was supposedly from mars in the northern part of Africa.  the authors claims that a piece from MArs was found on earth. On the grounds that researchers have done many tests and have concluded that it came from Mars a long time ago.The warrant is that all meteorites that land on eath have the possibility of being from Mars. The rebuttal could me made that the scientists are being ridiculous, and that those rocks could just be a random meteorite from anywhere in the universe. How can the scientists so sure that is from Mars? The claims that are made are almost all fact claims, with some value claims scattered throughout. There is also one policy claim when they said they will further look at the rocks and try to discover more about the red planet. The ethos of this is not in question because it comes from a large media station that millions of people look to to get the news.

http://www.foxnews.com/science/2013/11/21/mars-meteorite-look-at-martian-crust/