Saying that colonial organism like corals are tens of thousands years old is cheating IMO. The colony may be that old but the individual polyps are not.

You might as well say that the city of Rome is a 2500 year old "organism".

Smarter people don't really care about a watch looking "classy" since that's just a euphemism for an embarrassing show of wealth

"Classy" only equals "expensive" for people who don't have class.

we have kind of killed off most of the natural predators.

A good thing that there is still one natural predator left: ourselves. PETA is unwilling to understand that humans are the current top predator.

There's this great myth in science, perhaps promulgated by the likes of Popper, that science is a series of revolutions terminating periods of retrenchment and even inactivity.

That's Kuhn, not Popper.

There's actually a hunting technique that's been used called exhaustion hunting, where people chased a deer or whatever until it collapsed from exhaustion and then ran up to it and killed it.

Still in use: Human mammal, human hunter.

They will have to breed, researchers looking into how many people did it take to originally populate north american continent (answer was about 70)

If I remember correctly, there is a Stephen Baxter story about a multi-generation starship in which newer generations come to believe that there is not really dangerous empty space behind the walls, that is just fabricated mythology to keep the rulers in power (or something like that). Perhaps it was "Ark".