Specimens of Archaeopteryx The end of the feather has an obtuse angle of 110°, while the barbs branch off from the rachis at an angle of around 25°. The barbs branch noticeably into barbules, as in the feathers of modern birds. The base of the feather consists of plumulaceous barbs which are unconnected to one another and result in a down-like appearance. This tuft of down led Griffiths to conclude that "Archaeopteryx" might have been endothermic in that it implies the use of thermal insulation. The feather is clearly asymmetrical, which has been interpreted by many scientists to be a clear indication of
This Bird Has Flown – A 40th Anniversary Tribute to the Beatles' Rubber Soul This Bird Has Flown – A 40th Anniversary Tribute to the Beatles' Rubber Soul This Bird Has Flown – A 40th Anniversary Tribute to the Beatles' Rubber Soul is a tribute album by a variety of artists that commemorates the 40th anniversary of the release of the Beatles' 1965 album "Rubber Soul". It was released on October 25, 2005 by Razor & Tie. It follows the track listing of the UK version of the album, although the two songs added to the American release are available as bonus tracks on iTunes Music Store. Writing for Allmusic, music critic Stephen Thomas