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So i have been thinking about this for a while now , When i think of evolution i think of something that came from nothing and then kept growing with time in size but when you look at the animal sizes it started huge and got smaller and smaller with time , My other question is Do you believe in the evolution theory that is suggested by scientists ? I’m not indicating or asking about religious , Its just when i look at the wild life and humans its just much much much more complicated than to be explained in our life time and so much questions to be answered, Last do you know any good movies or documentaries about these kind of subjects ?
Thank you , I hope my English was clear for you to understand .

The fossil record suggests an enormous amount of biodiversity in the ages like the Eocene (jungles worldwide). Also, one time in the Campanian (starting 77,500,000 years ago for approx. 3,000,000 years), North America’s diversity of large dinosaurs exploded, and this correlates with a temperature rise.

I think not. Mammals and dinosaurs appeared the same time ( late Triassic). And where both pretty small. Go to the Cretaceous and dinosaurs had came in many DIFFERNT sizes varieties and basically filled every ecology niche. The mammals where still unchanged. All of them where about the size of a mouse and only ate insects. After the dinosaur wen t extinct that when we say mammals become DIFFERNT vartites and started to change size. I think if the dinosaurs never went extinct they would still be the apex organism.
Dinosaurs and ancie t reptiles filled every ecological niche mammals do now. (pilosaurs for dolphins and whales) ( raptors for wolfs and lions) ( small tree dwelling dinosaurs for squirrels and rodents) etc erc Not to mention no mammals has really reached the size of any dinosaurs. Short face bear the largest mammalian predator that ever existed was tiny compared to the 60 foot long spinosaurs. Basically what I’m trying to say if dinosaurs never gone extinct us humans and many other mammals would not had even evolved. And we still be the same size of a mouse.

I think not. Mammals and dinosaurs appeared the same time ( late Triassic). And where both pretty small. Go to the Cretaceous and dinosaurs had came in many DIFFERNT sizes varieties and basically filled every ecology niche. The mammals where still unchanged. All of them where about the size of a mouse and only ate insects. After the dinosaur wen t extinct that when we say mammals become DIFFERNT vartites and started to change size. I think if the dinosaurs never went extinct they would still be the apex organism.
Dinosaurs and ancie t reptiles filled every ecological niche mammals do now. (pilosaurs for dolphins and whales) ( raptors for wolfs and lions) ( small tree dwelling dinosaurs for squirrels and rodents) etc erc Not to mention no mammals has really reached the size of any dinosaurs. Short face bear the largest mammalian predator that ever existed was tiny compared to the 60 foot long spinosaurs. Basically what I’m trying to say if dinosaurs never gone extinct us humans and many other mammals would not had even evolved. And we still be the same size of a mouse.

Which group of animals evolved to fill the niches left following the extinction of the dinosaurs?
Answer
a.
birds
b.
mammals
c.
fish
d.
amphibians

First of all, I am only asking this question about true dinosaurs. I am aware of, but not asking about: Pelycosaurs, which lived before the dinosaurs; or Crocodilians, which lived before, with, and after them, etc…. It seems that every purely carnivorous dinosaur fossil we have found has been a two-legged Therapod. We have found bipedal herbivorous dinosaurs, but no quadrupedal carnosaurs. Is there a theory as to a reason behind this? Were Therapods simply first and “guarded their niche” successfully, or is there a good reason why a quadrupedal carnosaur wouldn’t be successful. Or, is it simply that we haven’t found their fossils yet?