One interesting theory on the cause of manic depression or bipolar disorder is that there is a super-fast biological clock located in the hypothalamus, in the center of the brain, which is actually a tiny cluster of nerves called the supra chiasmatic nucleus or SCN.
Since the release of the first novel, Harry Potter and the Philosopher's Stone, on 26 June 1997, the books have found immense popularity, critical acclaim and commercial success worldwide.
J.K. Rowling Just Published a New Harry Potter Story. Nearly seven years after publishing the final book in the Harry Potter series, J.K. Rowling has given fans an update on the beloved wizard in new writing published to her website Pottermore.