The French scientific journal Science et Vie made the following comment regarding this bird, now known as Confuciusornis sanctus: "According to Chinese and American palaeontologists examining the fossil . . . they were dealing with a first class discovery. This flying bird, the same approximate size as a water rail, is around 157 million years old . . . older than Archæopteryx." (Jean Philippe Noel, "Les Oiseaux de la Discorde," Science et Vie, No. 961, October 1997, p. 83.)The significance of this discovery is obvious; the fact that Confuciusornis lived during the same period as a life form claimed to have been the supposed forerunner of birds—and the fact that it bears a very close similarity to present-day birds—totally invalidates evolutionists" claims.There are several structural differences between birds and reptiles, one of the most important of these being bone structure. The bones of dinosaurs—regarded by evolutionists as the supposed ancestors of birds—are thick and solid, making them very heavy. On the other hand, the bones of birds—both living and extinct species—are all hollow and thus very light, which is of great importance in their being able to fly.Another difference between birds and reptiles is their different metabolic rates. Reptiles have one of the slowest metabolisms of all life forms on Earth, while birds hold the highest. Due to a sparrow"s very fast metabolism, for example, its body temperature may sometimes rise to as high as 48°C (118.4 F). Reptiles are unable to generate their own body heat, warming their bodies by basking in the sun"s rays. Reptiles consume energy the slowest, while birds consume it the highest of all.Despite his being an evolutionist, Alan Feduccia strongly opposes the theory that birds and dinosaurs are related, on the basis of scientific findings. On the subject of the dino-bird evolution thesis, he has this to say:Well, I"ve studied bird skulls for 25 years and I don"t see any similarities whatsoever. I just don"t see it . . . The theropod origins of birds, in my opinion, will be the greatest embarrassment of paleontology of the 20th century. (Pat Shipman, "Birds Do It … Did Dinosaurs?," New Scientist, 1 February 1997, p. 28.)