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What are the 39 types of sharks known to harm humans? Well, as soon as you read this question, your mind probably started racing, your heartbeat became more rapid and your throat dried out. The question that probably consumes your thoughts right now is: Are there that many dangerous species of sharks out there?

Well, calm down. Yes there are 39 types of sharks known to have harmed humans but only three species were actually involved in unprovoked shark attacks. No, Jaws itself, better known as a Great White shark was not one of these species. Surprised? In fact, out of 1190 shark attacks between 1580 and 2005, there were only 3 provoked shark attacks, one being fatal. Each of the following species was involved in one shark attack: the Hammerhead shark, the Blue shark and the Shortfin Mako shark. The fatal attack was done by the Hammerhead shark.

So according to the ISAF (International shark Attack File) between 1580 and 2005, there were 1187 unprovoked shark attacks done by 36 types of sharks. In fact, 17 of the 36 species involved in unprovoked shark attacks were responsible for 5 shark attacks or less. These types of sharks are: the Galapagos shark, the Tope shark, the Silvertip shark, the Spiny Dogfish shark, the Tresher shark, The Bignose shark, the Smooth Dogfish shark, the Basking shark, the Horn shark, the Sixgill shark, the Whale shark, the Greenland shark, the Whitetip Reef shark, the Porbeagle shark, the Leopard shark, the Mako shark and the Great Hammerhead shark.

Of the remaining 19 types of sharks known to harm humans, 6 types of sharks are responsible for 6 to 9 unprovoked shark attacks. These are the following species: the Grey Reef shark, the Oceanic Whitetip shark, the Sandbar shark, the Sevengill shark, the Dusky shark and the Silky shark.

Of the 13 types of sharks that are left, 3 species are responsible for 14 to 19 unprovoked shark attacks. These are the following types of sharks: the Spinner shark, the Blacktip Reef shark and the Bronze Whaler shark.

Of the 10 types of sharks that have been involved in 23 to 27 unprovoked shark attacks on humans, you have the 3 following shark species: the Lemon shark, the Caribbean Reef shark and the Wobbegong shark.

Now you have the top ten sharks that have been known to attack humans, 7 species are responsible for unprovoked shark attacks while 3 species that were mentioned earlier on this page have been involved in provoked shark attacks. The 7 species are: the Great White shark, the Tiger shark, the Bull shark, the Sand Tiger shark, the Requiem shark, the Nurse shark and the Blacktip shark.

The top 10 species are: the Great White shark (#1), the Tiger shark (#2), the Bull shark (#3), the Sand Tiger shark (#4), the Requiem shark (#5), the Nurse shark (#6), the Shortfin Mako (#7), the Blacktip shark (#8), the Hammerhead shark (#9) and the Blue shark (#10). The numbers of shark attacks done by these species vary between 36 and 410.

As you can see, the 20% types of sharks involved in shark attacks may seem impressive but not as alarming as you may have thought at first.

It appears that since 1750 the planet has been gradually warming. This is now thought to be due to human activity - caused by man alone. Amazingly there are still people who doubt that global warming either exists or is caused by man. They insist that such events are only circumstantial.

They claim that temperatures go up and down and that greenhouse gas levels are much the same. Estimates suggest that summer temperatures in the U.K. could rise by up to five degrees centigrade in the southeast of England. This is predicted by the year 2080 and has been supported by a scientific panel of 2,500 scientists appointed by the United Nations. Areas in sub-Saharan African and parts of the Mediterranean would be even more dry with episodes of droughts.

The effect of global warming will be also that of increasing storms and rainfall and this will be increased in the winter months, especially in northern Europe. Many parts of Britain already have very little snow fall and it is thought that snow would be a thing of the past in Britain by 2080. In tropical regions, that already suffer from hurricanes and cyclones, it is thought that these will increase in frequency and intensity.

The effect of global warming is also that of increasing sea levels as the polar ice caps melt. Areas such as Bangladesh, which is low lying, plus areas of the African coast would be flooded repeatedly if sea levels rose. It is predicted that it may rise by up to 17 inches in some parts. This would lead to some parts of the world being uninhabitable.

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