let's bring in shark expert george burgess, the director of the florida program for shark research.you. another teen was attacked by a shark on that same beach, the same day, and there was yet another shark attack on thursday on florida's ginseng beach. what is going on here? is there a logical explanation? is this usual this time of year? >> actually it is fairly typical this time of year, with the water temperatures warm along the east coast of the united states, the sharks begin to move from south to north and head into warmer waters. and, of course, humans are doing the same thing. tass gets warmer to the north, more people enter the sea. we can sort of watch the progress of the sharks as they move from florida all the way up the east coast, but sort of follow some of the small bites we get. >> okay, so types of sharks, what are we talking about here? >> in this case, probably mostly black tip and spinner sharks, species that get to about 6 feet in length and are primarily fish eaters. so these are probably cases of mistaken identity in most situations. >> isn't that usually the

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george sterling, the poet who wrote "the cool, gray city of love" came out to carville a lot. and this guy really loved it. gillette burgesserious novelist but he was better known for his children's books and nonsense works. he wrote "the purple cow." have you heard of that one? it's an old san francisco one. but he got so sick of it. tive written down here. he hated people reciting it back to him so he wrote, "a, yes, i wrote "the purple cow," i'm sorry now i wrote it. but i can tell you anyhow, i'll kill you if you quote it." he used carville in two of his novels, scenes and characters. one is a romantic. a guy rents one and brings his dates out there for a little romantic rendezvous. and another one where an old car conductor rents a car and it comes to life. you have to read more in these books. another artist and musicians. this car on the left, number one, was called la bohemme rented in the sutro section by musicians who when they finished their work downtown in the clubs and theaters would go out to carville to this clubhouse in the night and drink and go skinny dipping in the surf and raise all sorts of ruckus. th