Here’s a novel idea: Don’t use abbreviations you don’t understand. If the writer for Yahoo! Makers had followed that advice, she wouldn’t have used the abbreviation i.e. (which is short for the Latin id est, or that is):
The writer is giving an example of an “infinite” mystery, not explaining what it is. If she’s going to use a Latin abbreviation, the correct one is e.g. — not that I’m recommending it. Writers, editors, and readers don’t understand i.e. or e.g. There are alternatives to using e.g., like such as, for example, for instance, and like.