Well, you need to keep on top of your religion, like I do mine. I don't ask you to teach me the bible do I? However, I will attempt to educate you. It is known that the size of insects is limited by oxygen available in the air. If you have low oxygen, insects will be smaller to enable them to be active. Large insects with low oxygen would cease to function. This is why we no longer see giant dragonflies or indeed giant cockroaches.
Dinosaurs also pose a big problem. Look at the size of the large specimens. Do you realise just how much oxygen would be required to feed all that body tissue and drive muscles. The nostrils on most dinosaurs aren't much bigger than those found on a horse, so no way could they suck enough air into their lungs to feed their body. That is with the oxygen levels of today. If you had a t-rex in a lab now, genetically engineered as in the movie Jurassic park, it would quickly suffocate unless you put an oxygen mask on it. So decades ago it was theorised that oxygen levels must have been much higher on the Earth for giant insects and Dinosaurs to exist. The atmospheric pressure was probably greater too, giving flying dinosaurs more chance. Look at these two snippets, but the internet is full of such things.
New Scientist - Google Books
TrueAuthority.com - Dinosaurs - Death of the Dinosaurs
Dinosaurs also pose a big problem. Look at the size of the large specimens. Do you realise just how much oxygen would be required to feed all that body tissue and drive muscles. The nostrils on most dinosaurs aren't much bigger than those found on a horse, so no way could they suck enough air into their lungs to feed their body. That is with the oxygen levels of today. If you had a t-rex in a lab now, genetically engineered as in the movie Jurassic park, it would quickly suffocate unless you put an oxygen mask on it. So decades ago it was theorised that oxygen levels must have been much higher on the Earth for giant insects and Dinosaurs to exist. The atmospheric pressure was probably greater too, giving flying dinosaurs more chance. Look at these two snippets, but the internet is full of such things.
New Scientist - Google Books
TrueAuthority.com - Dinosaurs - Death of the Dinosaurs
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