<human>: Can you condense the text into three sentences or less?

**BACKGROUND**: My girlfriend came to the States from China five years ago (she was 18). She never really paid attention to school work when she was in China and couldn't speak English until she got here. Since then, she's worked hard and now she's in nursing school (final year), speaks English well (7 out of 10 proficiency), and very focused in her goals. But she lacks general knowledge outside of her area of study (biology, medicine, etc.).  A few examples...

* She knows that bad things happened to Jews during the Holocaust but doesn't know who exactly Hitler is.

* She doesn't know much about our solar system beyond the earth, the moon, and the sun.

* She's an atheist out of convenience and not because of reason. (I'm agnostic myself.)

You get the idea. Don't get me wrong though--she's smart. She's just not very well-exposed because of her childhood. 

And the other day she said, "I want to be a more complete person. I wanna know about the things you laugh about and I don't get them. I want to have some insides." (Those are her exact words.) 

I promised her that during this winter break, we'd spend an hour a day googling around on a topic. I think that'd be a really nice thing to do for her. Now, I myself came to the States six years ago as an international student, albeit with a better educational background than hers, and I'm sure I can also benefit from the experience.

So I'm turning to you Reddit, for things that you think we both should know/learn about. It doesn't have to be an intense learning experience. Just random facts/history/science.
<bot>: My girlfriend and I want to learn about interesting things a topic a day this winter break... Just random facts/history/science.  What are your suggestions?