We predict eclipses for 2000 years. But how?
Imagine: you are the man of antiquity, some kind of Neanderthal, and your faithful sun suddenly and unexpectedly darkened. You’re scared. You think: “What if it never comes back? What we have angered God… ancestors? Oh, and here it is back. Carried”. But then, years later, this repeats. You lose faith in the constancy of the sun and start to record when these events happen. Centuries pass and finally get the picture, thanks to which early civilization was able to predict when they occur strange events.