great white Sharks and humans

I was watching History Channel and they had this discussion about Great Whites attacking.
I understand they were hunted pretty hard but coming back in force. They are getting closer to Beaches where Swimmers participate . I gather from the show that these sharks are getting bigger and are attacking Human. There was a case where a Killer Whale attacked her Trainer and killed her. The trainer I gather did not know what hit her as the Killer Whale came up from the Rear which is the way they hunt. I saw on evening where Killer "Whales actually come up on the beach for Seals. Just a stupid thought - I wonder if these Sharks are actully figering out who their enemies are. I think I saw where one got caught or was beached was somewhere 30 plus feet long. Somebody said on the show that there ancesters were 35 feet long. It could be that modern day shark are trying
Not to get off of the subject there was a show on Adolph Hitler about whether he had escaped or was deadIt waks quite interesting asthere were Rumors that he was in South America in Argentina. They are bringing some new Ideas on old subject as what happened to him
I also watched where the Gizzley were actually getting into the Poler Bear companyand were mating with the Polar Bear. Enough said it is after 12.00 Midnight so better close =Don