How Can Dragons Breathe Fire?

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Scientists have been finding new things about new creatures daily. Dragons are one of those many creature. They are very large with claws, fangs, and enormous wings. They also happen to breathe fire. Scientists have been pinning over questions about them for many years. The question that has been most researched is: How could dragons have breathed fire? Now, finally, they found an answer. Actually they found many, but the answer magic won’t due, scientists have found scientific ways in chemistry and other sciences. So let’s burn our way through the three theories about how dragons can breathe fire and ignite curiosities even further.
Fire needs three key things to ignite: heat, fuel, and an oxidizing agent (usually oxygen). Supposing dragons breathe like mammals, the oxygen that dragons draw into their lungs isn’t completely depleted when they exhale . For healthy humans inhaling it’s about 20.9%, and exhaling it’s about 15.3%. Not a huge difference, but this is a dragon and they would have to have larger lungs so a larger lung capacity, and a larger amount of oxygen left in their lungs after exhaling. The amount of oxygen they would still have in their body after they exhaled wouldn’t be too much, but it would be just enough to coax a small flame out of the dragon’s body (not nearly large enough to burn the inside of the dragon’s mouth). When it’s out, the oxygen in the air will keep it alive. As you can see in the picture to the left, the dragon is emitting fire outside the mouth. There is only a little flame as inside of it so there is no reason that the dragon would burn the inside of its mouth, and it also proves that they use the oxygen in the air.
Next in the line of fire is fuel. The fuel that scientist think dragons make ...

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