This site is very interesting, it also has your answer, (excerpts and the site):
The Komodo dragon (Varanus komodoensis), also known as the Komodo Monitor, Komodo Island Monitor, Ora (to the natives of Komodo), or simply Komodo, is a species of lizard which inhabits the islands of Komodo, Rinca, Flores, Gili Motang, and Gili Dasami in central Indonesia. A member of the monitor lizard family Varanidae, and the clade Toxicofera, the Komodo is the largest living species of lizard, growing to an average length of 2-3 metres (approximately 6.5-10 feet). This great length is attributed to island gigantism, as there are no carnivorous mammals to fill the niche in the islands that they live on, and the Komodo dragon's low metabolic rate. As a result of their great size, these lizards are apex predators, dominating the ecosystems in which they live. Megalania is an extinct giant monitor lizard. It was one of the megafauna that roamed southern Australia, and appears to have become extinct around 40,000 years ago. It was once thought to belong to a distinct monotypic genus and called Megalania prisca, (Greek "great" + "roam", "in reference to the terrestrial nature of the great Saurian" (Owen, 1859)). Its placement as a valid genus remains controversial, with many authors preferring sinking the genus into Varanus (Molnar, 2004), which encompasses all living monitor lizards. The first aboriginal settlers of Australia would certainly have encountered living Megalania.
* http://www.dragonsguide.com/
if you are asking the question of when people started believing in dragons, they have been around for as long as we have.
Marsupial frogs have been known to jump distances of up to 1 meter, or 3.3 feet. Their long hind limbs and unique mode of reproduction contribute to their ability to leap such distances.
there could have been dragons a long time ago (thousands of years ago). today we have animals similar to dragons (like kamodo dragons) or other species close to dragons. no one knows but dragons are in legends.
About 15 feet. Not as long as Fire Dragons, but still long.
The kangaroo is a marsupial. A marsupial gives birth to tiny, undeveloped embryos, which then usually develop in the mother's pouch or, in the case of the few marsupials without a pouch, they develop while clinging to the mother's underside, secured by their attachment to the teat which has swollen in their mouth.
According to Ripley's Aquarium, the length of time a sea dragon lives is not known. The sea dragons eat sea lice and crustaceans to survive.
Kangaroos belong to the marsupial family known as 'macropods'. The word "macropod" is a Greek word meaning long-footed. A macropod is a marsupial with strong hind legs, which tend to use hopping and jumping as their main means of locomotion (movement). Their feet are long, and have sharp claws at the end.
Dragons don't exist, so their life span is not measurable. The only creature that is known as a dragon is the Komodo Dragon, which is nothing like the Chinese Dragons of myth.
longer than the countries were combined into gondwanaland. i hope this helps you.
Marsupial young are less than two centimetres long at birth. This is the case with all marsupials, regardless of the species.
Despite the stereotype that apparently has been forged, dragons do NOT fart fire.
LONG.. very long