reply to post by DAZ21
I have a few points for you:
Homo sapiens (humans) are an individual species, while dinosaurs are vast amount of species. Dinosaurs evolved as well. The early dinosaurs were
different from the ones that lived at the end of the Triassic period, it wasn't like the same species of dinosaur lived 135 million years. Comparing
humans to all dinosaurs isn't really feasible. If you want to take just hominids, you can go back 7 million or so years, for all of primates 40
million years, and for mammals around 70 million years. Those are the numbers you should be comparing. The evolution of dinosaurs vs the evolution
of mammals. 135 million years vs 70 million years.
Natural selection isn't just about competition, it's about surviving drastic environment changes. Mammals were pretty rare until the impact event
wiped out the dinosaurs. Dinosaurs dominated before that, but couldn't adapt to the new earth climate. Mammals could, and they ended up taking over
as a result. Evolution doesn't really follow a time table, it just goes with the environment, and if there's no big need to change most organisms
will not change much beyond genetic variance. For dinosaurs, their height, tough skin, and razor sharp teeth were the prime characteristics for
survival, intellect was not, although there were some dinosaurs thought to be somewhat intelligent. Most were not, however.
For rivals and competition, humans definitely had it. At one point they shared the earth with neanderthals, denosivans and a few other hominids.
Humans were able to survive the last ice age while the others were not. My guess is that we were a little smarter and made better use of tools to
build shelters for survival, or it may have simply been the location of Africa that helped because it was warmer there and we dominated that area.
There's a lot unknown about how we survived and they didn't, but we definitely had rivals.