Re: KT boundry event

I believe the reason we did not get more dinos again is because the
earlier extinctions Triassic/Jurassic were not complete, so there were
still plenty of dinosaur species around to reclaim their niches. Unless
you count birds as a type of dinosaur, and some large ground-dwelling
predatory birds are known from the post-boundary eras. But I'll
speculate that by the time these large birds evolved there were many
many more large mammal species able to out-compete them: Quantity over
quality, perhaps, or perhaps advanced mammals were able to meet the
re-evolving bird/dinosaurs toe-to-toe and win out.

Also, there were some fairly large reptiles in the ages following the
dino extinction. Komodo dragons come to mind, plus if I remember right
some very large crocodile/alligator species, 40-50 feet long.

As I understand it, in general reptiles cannot compete with mammals for
the large creature niches; Komodo dragons only survive because they are
located on remote islands, for example. The very broad picture would be
that primitive mammals out-competed reptiles, then dinosaurs nearly
swept the board until they went extinct, when the mammals took over
again.

Of course, we don't know for certain that there were no large mammals
livings alongside dinosaurs -- we just haven't found any evidence so
far.

.

Relevant Pages

  • Re: Conservapedia on the dinosaur
    ... does not use the word "dinosaur." ... in numerous places throughout the biblical account. ... behemoth in Job and the leviathan in Isaiah are sometimes said to be ... and only mammals have navels. ...
    (talk.origins)
  • Re: Conservapedia on the dinosaur
    ... does not use the word "dinosaur." ... beast's navel, and only mammals have navels. ...
    (talk.origins)
  • Re: Conservapedia on the dinosaur
    ... does not use the word "dinosaur." ... only true English translation, clearly says that behemoth was a ... beast's navel, and only mammals have navels. ...
    (talk.origins)
  • Re: Conservapedia on the dinosaur
    ... does not use the word "dinosaur." ... in numerous places throughout the biblical account. ... behemoth in Job and the leviathan in Isaiah are sometimes said to be ... and only mammals have navels. ...
    (talk.origins)