"Dimensio, you got suckered."
Trying to learn something about evolution is 'suckering' someone?
Explain?
For the moment I'm running with the idea that Bigh4u2 genuinely wants to understand the scientific viewpoint.
Bigh, the reason for b_sharp's "sharpness" is that in these threads we often get new creationists with what they think are "gotcha" questions that somehow haven't occurred to millions of professional biologists over 150 years. Usually these people turn out to have no interest in actually understanding why biologists overwhelmingly believe that the evidence supports evolution, and their unwillingness to learn (despite a common pretence of interest) can get very irritating. I am sure that you aren't like that though.
"Was it environment that caused their extinction, because of their stubborness to adapt to that environment, or where they just too stupid to move?
"Maybe a catyclismic change that was unavoidable?
"BTW. Thanks for explaining these things to me in a way that even a dumb 'layman' like myself could understand
The last two statements follow the formula of responses the typical creationist uses when trolling for an evolutionist to argue with.
If what you asked was indeed in earnest please accept my humble apology.