A lot of experts are actually very curious about this because they are not sure if dinosaurs can be considered mammals or reptiles in the beginning. According to their studies, dinosaurs are similar to reptiles in terms of appearance, but because of their size, it is evident that they are also able to regulate their own body temperature, which is more similar to mammals.
Right now, modern taxonomy still believes that they are more similar to reptiles as compared to mammals. There were a lot of giant dinosaurs that became extinct after the meteor struck the earth, but some of these dinosaurs, particularly the smaller ones, have evolved as other creatures.
Modern taxonomy classifies Dinosaurs as reptiles. Although they portray characteristics of birds, mammals, and reptiles, they are mostly classified as reptiles. Dinosaurs were kind of warm-blooded, but they do not produce milk nor have hair like mammals. Studies have shown that some reptiles can be warm-blooded; another example of a reptile that is warm-blooded is tegu.
Just like other reptiles, Dinosaurs reproduce by laying eggs not by giving birth to their young ones, which is characteristic of mammals. Dinosaurs grew quickly from small eggs to tons in weight relatively. The skull of a dinosaur looks like that of other reptiles. They have holes behind their eye sockets, and another pair of holes on the roof of the skull kitty-corner to these. Only reptiles have similar holes.
