Wrong. The dinosaurs died out because of food problems. What food problems? Marshmallows.
The dinosaurs, when they first started out, ate meat, plants, sometimes a bit of both. Then they got clever. They invented technology, buildings. They went environmentally friendly. And therein lie their downfall. For the more advanced a society gets, the less evidence of themselves they leave. This is why the paleontologists haven't figured it out yet: no evidence. None whatsoever.
Anyway, back to the marshmallows- the dinosaurs made a planet-wide treaty to respect one's fellow dinosaur and the environment. So they did. they found a special mind altering substance that, due to their specific physiology, made them think they were eating the thing they loved most. And this drug provided them with all the necessary nutrients and antibiotics and so forth.
This amazing drug is called the marsh-1,3- diol where the marsh had many different functional groups. Because it was derived from the photosynthetic pigments of the Mallow plants, it soon became known as marsh mallow. The photosynthetic pigments by the way, is the reason for the dinosaurs being green (it's not easy being green!) Eventually, use of marshmallow led to dinosaurs being able to photosynthesize.
But they got hooked. Completely addicted. The scientists hadn't realised that it was a pan species trait. So they went and ate more and more marshmallow. Eventually, some dinosaurs modified their genes, leading to their offspring being able to breathe fire (the dragons of myth).
This gave these dragons an evolutionary advantage over the other dinosaurs. Eventually, however,- due to the fact that everything, if it is loved by enough people in one spot - (take tea in England) Something strange happened. The marshmallow achieved sentience.
By this point, The dinosaurs were so hooked they didn't care. So they carried on hunting the marshmallows. And the Marshmallows, as all good underdog species will (read any scifi aliens-invade-tech-inferior-earth to find out) fought back. And eventually they got so good at it that one by one, the dinosaurs died. Except for the dragons. Being able to breathe fire meant that they were able to hold the marshmallow off. and they found, oddly enough, the marshmallows actually taste better lightly toasted. This meant that the dragons were able to survive until people evolved and were able to tell stories about them that turned into the myths we have today.
Eventually though, even the dragons died out.
And it is thought , by those in the know that the marshmallows, deprived of their natural enemy and their OWN food source died out as well. Before this happened however, a dead marshmallow was found by a young lad in ancient Egypt, and he figured out a way to replicate a none- sentient version of them. However, there are other who believe, that on occasion a poor supermarket worker is unpacking a crate of marshmallows and mysteriously disappears...
