Dinosaurs have fascinated kids and adults alike since the very beginning of the discovery of their existence. Their habits, characteristics, and even their appearance are still a mystery, which naturally makes them that much more interesting. Here is a list of all confirmed/unconfirmed dinosaur genera, along with some basic facts about the reptiles that dominated the Earth before mammals.

Classification and Terminology: Since there is no way to confirm and classify all the dinosaur families, there is no official taxonomy for them. However, the dinosaur genera list created and published by George Olshevsky, the biological nomenclature expert, released in 1995 is the one still followed and updated regularly.  The terminology conforms with the International Code of Zoological Nomenclature (ICZN), with the primary terminology explained below:

Junior synonym: When two or more genera are combined into one, all the specimens, other than the type specimen released first (the senior synonym), are referred to as junior synonyms	Preoccupied name: A name used for a new taxon after having already been used in print to describe some other taxon (these names are mentioned as ‘previously known’ names wherever applicable in the following list)
Nomen manuscriptum: Any name that has appeared in printing, but has no scientific backing	Nomen nudum: Any name that has been used multiple times in print, but is yet to be acknowledged by the ICZN standards

Interesting Facts

• What is the Biggest Dinosaur

The titanosaur Argentinosaurus huinculensis is believed to be the largest dinosaur (depending on uncontroversial evidence) being 98 to 130 feet long, weighing 50 to 97 metric tons.

• What is the Smallest Dinosaur

The Compsognathus, around 3 feet long, weighing about 2.5kg, is believed to be the smallest dinosaur genus, probably a little larger than a standard chicken.

• Which Dinosaur Had the Longest Neck

The Sauropod dinosaurs had the longest neck, which easily grew over 50 feet in length, approximately 6 times longer than that of a giraffe.

• When Did Dinosaurs Go Extinct

Dinosaurs became extinct around 65 million years back, when the Cretaceous Period ended. They had lived on this Earth for over 165 million years before extinction.

• What Killed the Dinosaurs

The mass extinction at the end of the Cretaceous Period (the Cretaceous-Tertiary or K-T extinction event) is one of the biggest catastrophic events in the history of this Earth, with its causes still up for debate among scientists. Large volcanic eruptions and asteroid impacts are believed to be the most viable causes for wiping out thousands of species, including larger marine reptiles, pterosaurs, and other large animals, in addition to dinosaurs from the Earth.

• Do Birds Come from Dinosaurs

Although it seems impossible, there are certain similarities between the prehistoric reptiles and today’s birds that has led scientists to believe that the latter evolved from the theropods or two-legged dinosaurs. Later discovered evidence proving the existence of feathered dinosaurs further established this theory. It is believed that a group of feathered dinosaurs evolved to be able to fly which helped them survive the great K-T extinction event.

In 2016, scientists found a piece of a feathered dinosaur tail, perfectly preserved in a 99 million years old piece of amber. The tail, discovered once the amber had been polished for making jewelry, belongs to a tiny feathered dinosaur. Experts believe this to be the chance to find out what these reptiles actually looked like since this is the first time something other than their fossilized bones have been found.