Penguins are a well-known example of flightless birds
Fish fossil from Cretaceous period
Prehistoric fish are various groups of fishes that lived before recorded history. A few, such as the coelacanth still exist today and are considered living fossils.
I did not meet Iosif Constantin Drăgan but, by his actions, as well as his books that promote the Romanian national pride and the idea that the Dacians, our ancestors, were a hardworking and brave nation, he gained forever my respect.