Researchers discover how a prehistoric creature the size of a giraffe was able to fly - USA TODAY

That was the Quetzalcoatlus, a type of pterosaur that once dominated the skies millions of years ago. Neither a bird or a dinosaur, the pterosaur was around for millions of years alongside the likes of the Tyrannosaurus rex and is one of the most recognizable creatures from prehistoric times.

Now, a group of researchers says they have figured out the Quetzalcoatlus did in fact fly and have learned how it did so by discovering two new types of pterosaurs.

There are few fossils of the Quetzalcoatlus, but Brown said there were hundreds of bones for a smaller type of pterosaur, which instead had a wingspan of 18 to 20 feet.

Brown said this analysis will hopefully lead to being able to connect all the different types of pterosaurs, as there have been an estimated 100 different types of them discovered