This is something I've thought of before.

I've done work for clients on 'celebrity' news sites and the amount of celebrity trivia I absorbed without conscious effort was terrifying. I knew who was who, who was banging who, what they'd done etc. And I really couldn't care less about any of them.

There should be sites that make it that easy to absorb math, science and technology and actual worthwhile subjects, but I think they would take a lot more effort, it'd be something worth paying for though.