Well, you might believe they did not, but many people in the world believe they did.

If you do not accept the Bible as revelation from God (and I would guess from your response that you do not), then I can see why you would reach that conclusion.

If, however, you do accept the Bible as revelation from God, the book of, well, Revelation :-D is a huge chunk of "privileged information about the end of the world". Granted, dates of events are not given, and a lot of the book is prophecy, so there is figurative language, but there is a lot of information there.

I used to entertain this idea, that you need faith to believe there is no god just as much as you need it to believe there are 1000. Perhaps you do. What does not require faith, however, is observation - at least to the limits to which we can test and trust our observations.

Atheism isn't a belief that there is no god, it's an observation that we don't experience any supernatural forces interacting with this universe.

> naive assumption that we know the limits of knowledge

I think very few people claim to know the limits of knowledge, but that is not the same thing as saying we know nothing. Asimov's essay on the Relativity of Wrong [0] is some of the best reasoning along this line of thought.

[He] went on to lecture me severely on the fact that in every century people have thought they understood the universe at last, and in every century they were proved to be wrong. It follows that the one thing we can say about our modern "knowledge" is that it is wrong.

My answer to him was, "John, when people thought the earth was flat, they were wrong. When people thought the earth was spherical, they were wrong. But if you think that thinking the earth is spherical is just as wrong as thinking the earth is flat, then your view is wronger than both of them put together."

[0] http://chem.tufts.edu/AnswersInScience/RelativityofWrong.htm

This is just a disagreement over definitions.

If you define alchemy as e.g. 'the search for the ability to transmute elements', then sure, nuclear reactions are alchemy. But that's not how the word is generally used. It's used to describe a practice bound up with a bundle of concepts, beliefs, and connotations[0], which mostly disappeared after the 18th century. (That's a useful thing to have a word for -- under a definition of alchemy for which nuclear physics is alchemy, you'd probably want to invent a different word to describe that practice, and then that just introduces unnecessary confusion when talking to people who use the more common set of definitions).

[0] https://en.wikipedia.org/wiki/Alchemy#Core_concepts