Of course it was a joke. A good one at that, I thought at the time.
I'm Greek. Even if I were not inclined to obtain a proper grasp of archeometry, our educational system insists on ancient history. I can assure you that albeit their breakthroughs were revolutionary, there were no secrets or 'mystical' knowledge in the hands of our ancestors, that we do not today possess and/or surpass.
It's elementary, my dear Watson. It's a simple fact that pants (other than a hilarious word) are a symbol of post 1800s globalization. They can relatively accurately be recognized as a trait of "modern man".
Putting all that together:
I was merely saying, it's ridiculous to think that people struggling to survive the elements did what we cannot; that they predicted the end of the world with the accuracy of the very day.