Birds or birds

Fossil records and modern genetic engineering research for "reverse evolution" show that birds are the last remaining dinosaurs, and in particular the last bird dinosaurs, due to the fact that they evolved - according to scientists - to from winged dinosaurs that belong to the group of thermopods. The first true birds appeared in the Cretaceous Period, around 100 million years ago. Evidence based on DNA studies shows birds have diversified and evolved from many forms and species close to an extinction event