Have you ever looked up at the night sky and asked yourself , "I wonder how big the Universe is?"
It gives me a headache trying to figure that one out.
I mean, everythig has an end, right?
But if the universe has an end, what's on the other side?
AHHH!
Too much thinking without an answer.

So I consulted the utmost expert in the field of Universe knowledge - Youtube - and found out the answer.
It's your educational lesson of the day.
Maybe you'll understand the whole theory.
I'm not sure I did.