Well after watching "reign of fire" last night I thought about dragons and this popped up in my wild imaginative mind! Considering how many Dragons were slain in various European folklores, it's interesting to see that not one part of any dragon's remains have ever been uncovered, you would have thought that such things would be kept as trophies at least once. That said, they are extremely prominent in a great number of Myths and legends, from the Eastern 'Serpents of Sea and Air' which were mainly benevolent, to the much more malevolent European version. I suspect the whole 'breathing fire' part of the Dragon stories (which mainly occured in Western tales) was more a matter of making them appear more fearsome, after all, it's a lot more valiant to say 'I hath killed a 3-storey tall monster that did spit hellfire', rather than 'I went out on a quest 3 months ago and hath found bugger all'. Take a look an old literature on European "dragon" and you find that they were not the skyscraper size creatures depicted in comic books, but the size of cattles, because that's what they were. Cattles always barf methane gas and they are curious creatures that occasionally get attracted to fire, rather than repelled by it as lowly creatures are. If it gets too close, the continuous methane gas that comes out of its mouth is ignited, and seeing a fire in front of themselves, them go wako, running amok and setting everything around them on fire. Since homes and agricultural products will burn without the help of fire extinguishers, they were much feared. It sounds dumb, but farmers occasionally make the news when they do bring a flame in front of a cow and it run amok, setting the barn on fire. The thing is, you can't just take a small lizard, stick wings on it, supersize it and then expect it to fly, something the quoted size of a Dragon would be as manouverable as a potato in the air, and would probably shred it's wings in the first beat. Even if it did have hollow bones and used hydrogen in it's stomach to increase lift (another theory as to how they could breath fire), you're basically talking about a Hindenburg of a monster, you wouldn't need a lance to kill it, they'd be on the verge of exploding every minute of the day. Let's take something from the velociraptor family and see if we can make it a dragon: We've already got a pretty fearsome creature--it's fast, presumably tough, and has a mouth full of nasty teeth, and a pair of disturbingly large and sharp claws on it's feet. Can we get it to breath fire? Well, we all know that biological organisms can produce various flammable substances, whether gasses such as hydrogen and methane, or liquids (oils, alcohol) or solids (fats). That's not too much of a problem in terms of possibility. We also know, thanks to the bombadier beetle, that it's possible to have an organic ignition system. It's not beyond the realm of possibility that a creature could have glands that produced a volatile liquid and other glands that would produce chemicals to ignite it at will. It would require a lot of energy to produce these substances, but it's certainly possible. If dragons were real then they could have just been another kind of dinosaur. But where did the fossils go? Last year National Geographic had an article about sea monsters. There is a fossil record to show that they did exist. They also point out that many of the ancient drawings of sea monsters almost exactly fit the fossil record. If large reptiles survived until humans spread accost the Earth why are they extinct now?