So, it's not my intention to turn this into an all-Doctor-Who, all-the-time blog. But I haven't been inspired to write much lately, so you'll have to forgive me.
So I have a theory on the events of last week's episode that I want to share. It's incredibly spoilery, so if you haven't seen "The Impossible Astronaut" yet, please DO NOT READ ON. Seriously, it will hamper your enjoyment of the show if you read this before you see it.
Here's an amazing photo of the sun. Just to fill some space in...
Still here? Okay. So, the little girl who regenerates at the end: what's her deal. It's implied that she's Amy's daughter, as Amy sees a photograph of the two of them together. But is it that simple?
Well, yes. Kinda. I think she's the daughter of Amy and Rory, two regular humans.
But remember, Amy was abducted by the Silents and had been kept for "many days." It was never explained why. We know the Silents have been trying to replicate Timelord technology ("someone's attempt to build a TARDIS"), and now I think they're trying to replicate Timelord physiology as well. They abducted Amy to futz about with her fetus's DNA and experiment with regeneration.
We know the Silents have an interest in Amy's pregnancy (the one at the White House is very keen that she tell the Doctor about it), and we know they were keeping a very close eye on the little girl at the orphanage.
Experimentation with Timelord biology was foreshadowed by River saying that aliens would gladly tear the world apart to get a single cell from the Doctor's body. (Perhaps this is even why the Doctor engineered his own death and fiery funeral?)
Lastly, this fits right in with the outside-of-Doctor-Who cultural narrative of the Grey Aliens (whom the Silents are clearly meant to resemble) as abductors who experiment with human reproduction and hybridization.
I think there's a lot going for this one! Of course, I'm willing to be proven wrong.