its no mystery people know the truth ok some of them they know those dinosaur are birds the won badit scientist try to pass off as dinosaurs look at spinosauridae and know its a reptile probly link with crocodilian and it is .and protofeathers are collogen fiber and no coelophysis type of dinosaurs every found with feathers those fake dinosaurs the dinobird all have long arms a bird flight feature big bird brain teeth replacement is different from real dinosaurs and microraptor was a true bird with flight feathers and flight sternum. oviraptor was found with a pygostyle. therizinosaur group inner ears is of a bird the wrist is moon shape like modern birds that help them fly better with good wrist movement dinosaurs have bad wrist movement the best was 18 degree a turkey 59 degree microraptor 60 degree eoconfuciusornis zhengi 55 degree 2 therizinosaur 26 degree 39 degree sinornithosaurus 35 degree oviraptor close reltive 76 degree. velociraptor qull nob is been debated another scientist fine different finding I doubt that was qull nob only strong flyer have qull nob velociraptor was a flightless bird it was too big. all dinosaurs were armo on there backs they could not climb trees to lose the armo like iguana monitor lizard basilisk chameleon they have no croc bums tuatara not a tree climber look like a croc.tuatara can take cold and dinosaurs closes reltive is the turtle .reason they not buying feather dinosaurs all bird link turn out not to be true fast growing by the bone tissue evidence it was false bird mother bone in t.rex false and they know about protoavis and they not getting all imformation from badit scientist they keep lefting out some of the detail. jack horner said steven has the last call on feather dinosaur on j4 and bird are knee runner they have fix femur the thigh bone they do not run like dinosaurs they have special bird knee on top of giant ankle .dinosaurs have crocodilian knee with very small ankle.dinosaur is a prehistoric crocodilian just a prehistoric alligator so all the movies were wrong