Have you got any ? <a href="http://gddirectltd.co.uk/index.php/skelaxin-side-effects-constipation-0ea0.pdf#colony">skelaxin high blood pressure</a>  The feathers on the Microraptor were not required for flying or gliding and they could be serving another purpose like during mating. The evolution of flight conforms to the hypothesis that symmetric feathers were evolved in dinosaurs that did not have an aerodynamic body. However, later the feathers were adapted to aerodynamic or streamlined body.