Dragons on Earth?

[Blue]

Thats not really a strong argument. the same could be said for dragons from another planet.

and their is evidence that large reptiles did live on earth a long long time ago.
including ones that flew.

[Ragnarok]

The argument is solid enough. In this case, there is no evidence that any creature resembling a dragon (e.g. a Western) has ever existed. Further, given what we do know about animals which currently exist and used to exist, it is highly improbably that they ever did. The main sticking point is in the six-limbed dragon, because there is no other vertebrate which possess six functional limbs, either existing now, or in the fossil record (leaving aside one-off mutations, which tend not to be very functional).

As for ones on other planets, it's an assumption that people make based on what we can see here. Mine, for example, would be from what I would describe to be an Earth-like planet. However, since there's no evidence of anything like them here, it must not have actually been Earth.

As for the dinosaurs, yes, they did exist. However, they're not what would be described as mythical dragons, either. Nor did they possess the six limbs that would be required for classification as a Western. A wyvern, perhaps, but that would also call into question whether any survived until the very recent past. All evidence points to the negative in that case as well, meaning that they couldn't be it either.
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To win against an opponent stronger than yourself, you must not be weaker than that opponent. - Takamachi Nanoha

[albvan]

There is no fossil evidence of large flying reptiles surviving to the age of man. Furthemore, for the mythical European dragon we have sufficient archaeological evidence that we can trace its "evolution" from a simple horned wingless legless serpent, such as one carved in stone from the Neolithic Balkans(image, dated cca 5000 BC (source site)) to the elaborate forms we can see in medieval bestiaries and which we are familiar with today. The Chinese dragon also had humble, Neolithic beginings (source).

However, the fact that humans have never seen a living dragon does not imply that a four-limbed dragon would not be biologically possible. There were some dinosaurs (birdlike, possibly even evolved from flying ancestors) that could easily sparkle one's imagination like these two:

Rahonavis ostromi
Unenlagia sp.

Maybe in the future we will discover even more intriguing fossils on Earth, though I wouldn't keep my hopes high.

Exploring life on other worlds would open a whole new perspective, but unfortunately we don't have the technical means to do anything about it.

[Blue]

one thing that has me second guessing that dragons are from space is how come I feel that I am a dragon and others to have a feeling but were from earth?

from what your saying it almost sounds like Scientology, other species from space in human bodies.

[Ragnarok]

I'm really not sure how else to explain it. Even from just an evolutionary perspective, there are no six-limbed vertebrates anywhere in the historical record, while four-limbed ones are plentiful. In order for a dragon (western) to have existed on this planet, we would need to assume that somehow, every single predecessor of that six-limbed family would have had to have died with no fossil evidence, whereas the four-limbed ones left plentiful evidence, and that every member of that branch died out, with no living relatives in modern times. This scenario goes beyond just "no evidence" into the realm of the astronomically improbable.
_________________
To win against an opponent stronger than yourself, you must not be weaker than that opponent. - Takamachi Nanoha

[albvan]