Yes there were a few remaining pockets of Aurochs, but most were gone. Same for the Giant sloth.
I notice you used these two examples to invalidate the whole argument I made without mentioning all the other animals that did go extinct - nice try.
As for a previous civilization(s) - you are rapidly becoming in the minority on that point of view with the constant barrage of new information about the past - both from discoveries and from the use of modern tech cf satellites and LIDAR.
Clinging to the meme of humans did it (killed off the mammoths) has now become so unlikely that hanging on to that POV is silly.
Using GT as an example that there was no previous civilization belies the fact that we sill have no idea who built it, why and how - if ‘they’ were the stereotypical image of ‘hunter-gatherers’. Using the lame explanation of they ‘could develop and pass on more knowledge than we previously thought” exposes the standard consensus thinking - the bane of any advancement in any field.
If you want references there are hoist of them on the internet, in libraries and books in print. Ask them, not me. I’m dome here.
I read somewhere that Aurochs survived until the early 17th century - last one dying in Poland around 1627.
“we sill have no idea who built it, why and how”
So let's assume that it was a part of ancient civilization... ? GT structures are not that advanced. They show that humans were making gradual progress over thousands of years on the way to build the first civilizations.
You're done here because you've got nothing to back up your claim that there were some civilizations over 12k years ago, let alone the world wide civilization.