This is less important, but wizards and witches live longer than Muggles, which makes perfect sense! Wizards can magically heal themselves, so it's obvious that their immune systems would be stronger than ours are.

Also, a friend of mine said, "If Harry can do magic, why doesn't he give himself perfect vision?" and I have a theory on that. I believe that magic keeps people from changing their appearance. Tom Riddle, to look like Voldemort, had to undergo dangerous transformations. He couldn't just wave his wand and be changed.

My mom was quoted to have said "it's interesting to me what the boundaries of magic are" and I can't agree more. Apparently, witches and wizards are limited to the magic they perform. No spell can awaken the dead, there is no cure for werewolves, and they can't change their appearance without risks. I am glad, very glad, that magic is limited…because, as humans, so are we. ("Caroline")

JK has said that the happiest people don't become ghosts, which makes sense.

With real ghosts (yes, I believe in them. I trust Sylvia Brown), they are also very unhappy. Someone who was peaceful and happy isn't going to stick around and haunt everyone. I think JK did a great job with the ghosts. It's a riot how proud they are of being dead. And this makes for a great Harry Potter joke - "I see dead people…they're everywhere…" lol.

But is there another reason, perhaps? Simply being unhappy can't be the only reason someone becomes a ghost, surely! You can be in a bad mood, then die unexpectedly, but just because you were having a bad day, you aren't going to be a ghost! Look at the evidence (don't you hate it when I do this…):

-Nearly Headless Nick was the victim of a botched beheading. Very painful and humiliating, not to mention that he must have done something to be the victim. Maybe he was falsely accused of something, and that's a good reason for him to be a ghost!
-Moaning Myrtle was teased for her entire life, the poor thing. That's enough to make anyone become a ghost - but also, she died right when she had been teased about her glasses.
-The Bloody Baron was probably lonely…and even in the afterlife, he's given quite a wide space apart from the other ghosts.

Only one thing…real ghosts have no idea that they're dead. Maybe it's different for wizards, I don't know, but I suppose that seems logical. ("Caroline")

There have been a lot of rumors about who's going to turn bad and go to the Dark Side. The question is, who will it be? As usual…time for options and logic! Fun times…

-Harry: Well, I should hope not! Why would be go over to the Dark Side, if it was the Dark Side that killed his parents? He said, quite clearly, in the first book that he would never go over to them. Besides, The Boss (Ms. Rowling) herself said that he wouldn't.

-Hermione: It's a possibility, but I don't see why she would. She very clearly hates Dark Magic. She's way too nice to become evil…I hope. Sometimes it's the last person you'd expect.

-Ron: This is the more controversial one. Ron is in the shadow of his brothers and clearly loves it when he gets attention. The Dark Side is an almost certain way to get attention and whatnot, but I don't think that Ron's likely to go over to the Dark Side, because he's too "Gryffindor" for that. I don't see him using Dark Arts in desperation for attention and power. That's really more of a Percy thing, isn't it?

-Ginny: I don't see this happening, since Ginny's so sweet and she's had too many bad experiences with the Dark Side to see any appeal to it.

-Percy: Yes. I think Percy will either go to the Dark Side or put one of his family members in Azkaban. My reasoning (ha, I had you thinking that I wouldn't have any for this category):

-Percy is extremely power-hungry and the Dark Side is very tempting to those with that disposition.
-Ron said in the third book, "'Course, he's very ambitious, Percy" and greed and ambition are qualities of many Dark wizards.
-Hermione said in the fourth book, "Percy would never throw any of his family to the dementors!" and Ron said "I dunno…if he thought we were in the way of his career…" Is JK giving us a clue?
-Percy is an extreme butt-kisser and very gullible, so he'd be very easy to tempt to the Dark Side.

So, you see what I'm saying? I think it makes sense. I've never liked Percy all that much anyway, so I don't care if he wants to go and screw up his life, but I worry about Ron and the rest of the Weasleys.

Fred or George: I don't think so at all. Voldemort wouldn't be amused if he waved his wand and it turned into a rubber ducky.

Neville: Um…I highly doubt it, as he's way too nice for that. Besides, his parents were tortured by Voldemort and can't recognize him now…I don't think he'd want to side with whoever did that to them. ("Caroline")

Flitch, a squib has been trying to learn enough magic to change her back.

Perhaps we will find out that Mrs. Norris possesses a secret that once
reviled will impact the forces of darkness, and ones restored to human form
she will aid our heroes.

In the end, she and a happier (and more pleasant) Flitch will finally be
together as humans. (Steven Vohl)

• So far, nobody has ever mentioned the heir of Hufflepuff and Ravenclaw, this could maybe explain why the wand of voldemort contains a feather of Fawkes because ALL THE HEIRS, including Ravenclaw and Hufflepuff, have a feather of Fawkes. And maybe in book 7 all four of them will compete against voldemort.
Now, who is the 4th?

J.K. said:" Harry an MALFOY will battle evil TOGETHER"
so than we have Harry from Griffyndor
Malfoy from Slytherin
maybe Hanna Abbot from Hufflepuff
and someone else for Ravenclaw (Cho-Chang???)
Maybe this crew will be called the "ORDER of the Phoenix" (Sam van Dam)

• it's all in the names! Professor Remus Lupin. Lupin is latin for wolf.
Professor Lupin is a werewolf. There is a roman Legend about two brothers
Remus and Romulus. They are abandoned as infants and thrown into a river.
They are then pulled out of the river by a wolf and nursed back to
health. They then live out most of their teenage lives with this wolf.
Somehow the build Rome and are then Made the rulers. But Romulus being
jelous and greedy kills his brother so he can become the sole Emporer. So
basically Professor Remus Lupin has a brother out there who will kill him
sometime before the seventh book. (JLPotter)

• I read in an interview with JK Rowling that Dumbledore was a 150 and fifty years old and McGonagall is 70. This means Voldemort is about McGonagall's. Harry found out about how witches and wizard's age. This may become important in furture books.. (Sarah)

• This is a though I had about Lupin. In the third book he says he's not an expert of Dementor fighting quiet the opposite. in one of the furture book Lupin could be over come by the dementors. (Sarah)

• Two things I have noticed which few people seem to have picked up: Vampires and Pettigrew's silver hand.

Each book has had something about vampires, whether Snape or Sirius look like them, but no vampires have yet been revealed. I think one is coming up.

The silver hand. Silver is poison to werewolves. I think Peter will kill Lupin somehow with the silver hand Voldemort gave him. (Wickedracer)