Julia: Astronomers used to think that the universe was geocentric.

　　Sergio: I think it was Copernicus who proved it different.

　　Julia: That's right. Nicolas Copernicus challenged the mindset and found that it was heliocentric.

　　Sergio: Heliocentric?

　　Julia: This means that the planets revolve around the sun. And our planet, earth, rotates on its own axis.

　　Sergio: You've become an astronomer. I wouldn't have guessed it.

　　Julia: In reality, we belong to one galaxy in a sea of galaxies.

　　Sergio: I used to watch the X-Files with FBI agents MULDER and SCULLY. They taught me a lot about UFOs and the paranormal.

　　Julia: You watch too much TV.

　　Sergio: The Discovery Channel did a program on the pyramids once. The archeologist said that the pyramids are the remnants of an alien civilization.

　　Julia: I suppose it's possible.

　　Sergio: Very possible.

　　Julia: Personally, I like the mystery of the cosmos.

　　Sergio: I would expect that from a romantic.