hitchhikers guide - What is the source of the quote: "The universe doesn't care?"

I found this article opening with the quote, but it has a different title than the one you mentioned.

In any case, based on a Google search it appears that Jeffrey Kluger (The author of that article) made it up. Pretty much every attempt to search for the phrase directs me to Kluger's article in one form or another, except for this article posted on Bernstein & Andriulli's website last week:

We are very, very small. In the context of even our Solar System, human beings are such a minute part of the total planetary existence that we’re hardly worth mentioning. Put that into the context of the universe, and we wouldn't be a footnote. As TIME Magazine reporter Jeffrey Kluger puts it, "There is no reason at all you should care about the universe. For one thing, it doesn't care a whit about you."

Emphasis mine. Although it does kind of sound like it belongs in a Douglas Adams book, it seems to be an original creation.