Four Wings, Good. Two Wings, Better; Palaeontology  

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Jenis: Article from Bulletin/Magazine
Dalam koleksi: The Economist (http://search.proquest.com/) vol. 405 no. 8810 (Nov. 2012), page 78-79.
Topik: International; Dinosaurs; Evolution; Animal Behavior; Paleontology

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Perpustakaan Pusat (Semanggi) Nomor Panggil: EE29.74 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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It is tempting to think of the process of evolution as one of continuous, stately progress towards better-designed organisms. In fact, it is full of blind alleys--as a fossil called Microraptor shows. At some point during the Jurassic period, a group of dinosaurs evolved feathers. These may have been for warmth, for display or for both. They were certainly not, at the beginning, for flight. But in one line of these dinosaurs evolution modified them for precisely that purpose. This modification led, via Archaeopteryx, a species that lived 150m years ago, to birds. Until recently, there were two schools of thought about how Microraptor carried its wings when in flight.

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