Can I get help on an issue where unexpected/illegible characters render in Safari on some HTML pages?

I am faced with a strange problem: On some websites, I have illegible characters and if I copy/paste the text into Google Translate or an editor like vim, the text appears normally in English. Here an example on the page: "The Alternate View" columns of John G. Cramer This is what I am seeing below: ![Illegible characters ][2] If I copy/paste the first paragraph into an editor, then I get : > If you could halt the expansion of the universe and then travel > outward in a straight line, would you eventually come back to the > place where you started? In other words, are all straight-line paths > in the universe closed circles? Or as Euclid would have put it, if > you project two precisely parallel light beams out into empty space, > do they ever cross? A recent analysis of the angular structure and > lensing of the cosmic microwave background radiation, as measured by > the European Space Agency's Planck Mission, suggests that the answer > to these questions is "Yes". We will start by considering the > curvature of space as represented in general relativity (GR). I don't understand where this issue could come from. Even by trying with a different VPN, the issue remains. I have also these same unrecognizable characters that represent normal text content on some gmail emails. Is there a way to fix/troubleshoot this on macOS?