You can tell my nine year old has that bit of geek in him.
Today, I went to buy him a toothbrush. One that plays a song when it touches your teeth. The entire song is how long you should take brushing.
When I got home, I teased him. “I got you a new toothbrush,” I told him, “one that plays songs from High School Musical!”
“I’m kidding, I think I got the Cheetah Girls.”
“Actually, I got you The Theme from Rocky.”
“You got me a Stephen Hawking toothbrush? AWESOME!”
(He thought I said “I got you A Stephen Hawking” not “I got you the Theme from Rocky”.)
So yeah, my son knows who Stephen Hawking is, but not too clear on the Rocky thing.