It seems that you have hit on examples of how delicate nature can be.<quoted text>
Yes, there are extinct animals and plants. But like you said, every single dinosaur is gone, both large and small. Not just a few types. Was every single species incapable of surviving, or did something wipe them out?
Was every single species of hominid incapable of surviving, after having lived and multiplied for millions of years? Or was there also a catastrophic occurrence that wiped every one of them out, but miraculously avoided wiping out primates and modern man? I wonder what the odds of that would be.
I have been in awe of the balance of (among others) the desert bio-theme is. For example, most deserts have some life that has adapted to that extreme. Sparse vegetation, rocks & crannies that still harbor insects, arachnids, rodents, snakes & lizards that are all delicately & intricately interacting. With possibly an occasional roaming coyote or raptor in the mix.
IF a 2,3,4 or 5 yr weather change comes about, one species could excell while another diminishes. Just amazingly delicate, wonderfully balanced.
Then humankind comes along & stirs the mix dramatically.