As most people should realize, is that Dynosaurs would never have been able to live in the current earth. Simple laws of physics puts up a delimiter
The solution that has come up, is that the earths atmosphere was so thick, that it reached 2/3 of the density of water. That sound logical, a simple
solution to the problem? Boyancy to counter the gravity? Where did the gravity come from, that attracted such dense atmosphere in the first place?
Volcanic eruptions, similar to venus?
No, it doesn't. The most obvious problem with this solution, is that an animal wouldn't need wings to fly in such dense atmosphere. It would be much
more logical for it to swim through it. Thus, if this was true, you should be able to find remnants of animals that were "swimming" rather than
"flying" through the air. That is, their body/wing ratio, was such that it was swimming rather than flying. A dragon fly, even with 70cm in size,
would never be able to swap it's insect wings. The insect wing, is designed for speed through less dense air, and not the devil fish wings, to flap
itself through dense water. This, is the most obvious problem with it.
Not to mention, it's skeletal body would not sustain itself in such an environment. Remember that the insect has an exo-skeleton.
So, whereas the boyancy would certainly solve the wieght problem. The form of the animals living during this era, certainly does not. Imagine a
brochosaurus moving it's huge neck upwards, in such dense atomosphere. This would be an act in slow motion, and the mammals motions would be
incapable of speed. Why would nature, design creatures with legs designed for speed ... in an environment, where speed is not possible.
Animals living in such an environment, would be more hybrids living between waterworld and airworld. Drawing in air, in such thick atmosphere would
require an enormous strength that it wouldn't be possible.
The amount of strength needed, to move a mammal in such an environment ... would make such a creature impossible.
For the land mammal equivalent animal, reptile, bird or insect to live in such an environment is just as much impossible, as it living in the current
Sorry, this is not the solution to the equation.
edit on 7/8/2012 by bjarneorn because: (no reason given)