The author beings telling us about the mass extinction, which happened "66m years ago, at the end of the Cretaceous period". There were four other almost entirely effective natural annihilation after the animal life became elaborate, and all of them are perhaps results of a similar impacts. The biggest one, ocurred during "the end of the Permian", gave reptiles the chance of inhabiting the land without any great disturbings. Thus was the extinction at the Crustaceous, which helped our ancestors rise. One theory, and the most accepted, states that these annihilations were a consequence of an alien impact, a meteorite, like the one found in Antartica. After telling the background information, the author repots that "Dr. Tohver and his colleagues" found a crater in Brazil, "40km (25 miles) across" in diameter. Furthermore, it was said that it didn't cause one of the mass extinctions because of its small size. However, Dr. Tohver proved it wrong by affirming that the rock triggered a series of huge earthquakes, releasing the methane under the surface of earth, consequently heating it up and killing 80% of all living things.
The author beings with a very good interesting introduction, perhaps humiliating some readers, reminding them of their infant ignorance. However, as he/she progresses through the article, the flowing is abruptly interrupted by the introduction of other ideas. It is possible to note that the author has a lack of organizing skills. Later when he/she explains the extinction caused by the rock found in Brazil, much confusion is written, forcing the audience to read the passages multiple times, and have some basic knowledge about the Permian mass extinction, automatically alienating the article from the Fait Divers. The author gives two pieces of information, but fails to sew them together and deliver the message of the article. He/she writes that the rock did have an impact on the Earth surface, but abruptly uproots the idea and moves on to the "huge burp of methane", not explaining what caused it, forgetting to mention that the rock triggered an earthquake, that triggered the "huge burp of methane". In the end, this article turned into a light revision to people that already know about the subject, and a confusing report, with its thesis buried somewhere between the letters.
http://www.economist.com/news/science-and-technology/21582243-biggest-extinction-history-was-probably-caused-space-rock-changed
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