Grandmaster =a scientist: Does every grandmaster have a university degree?

Forgive me for my curiousity..I keep posting "stupid questions" about grandmasters..I am just fasionated by this "phenomenon".

-Do they all have a university degree for example? Was there ever a grandmaster "from the streets", a true autodidact , maybe a garbage man who made it to toplevel? Or is being a grandmaster equal to being a scientist? 

Or is it also a matter of talent, like a soccerplayer who is really skilled but he "just can't help it".  

I'm don't know about their education, but I'm pretty sure they can all fly likke Superman!

Off course they are..just like Messi , or Micheal Jordan. I dont ask this becasue I am curious how they would solve the crisis in Syrie, but when you really get into something, I think it's normal to be fasinationed by major players and their achievements. Whether that would be chess, soccer or gardening.

Neither did Magnus Carlsen.

Lasker was a professor of Mathematics, and Alekhine had X - Ray vision. Hubner took a walk on the wild side, and Andersen never bathed.