[Lonely Bull]

And why doesn't anybody use proper punctuation at the end of a sentence with quotes? Did they pass a law against it or something?

I don't know if the writer is using what many call a "British style," but it calls for placing that period outside the quotation mark. I've seen multiple examples from countries that tend to follow that style. (The rest of the quotation has other things that I'd edit: for example, I'd remove the comma from "The only way my theory leaves them, is to find a counter example to our theory.")

[Normandy]

Also, the author is French.