As everyone in Australia is more than well aware, there have been an awful lot of shark attacks off Western Australian beaches recently. There's been a lot of debate about what's actually causing the increase. One popular argument is that it's mainly because there are just so many more people in the water now than in the past. And more people means there's a greater chance of contact with ocean creatures.

I don't buy that one. As well the massive increase in the number of attacks, there is an ...
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