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X-Ray Mag #4

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X-Ray Mag #4

March 22, 2003 - 11:40
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Main features in this issue include:

A Fishy Sixth Sense

October 13, 2011 - 23:32
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page 71

The environments in which the many fish species have evolved are very diverse, ranging from the shoreline to the deep-sea depths, from fresh-water streams to tropical lakes. Because of the great varie

Because of the great variety of these habitats, the senses of these different species have consequently evolved quite differently, exhibiting a great diversity, with many senses not yet understood or even identified. There are thus still many mysteries regarding the behaviour of aquatic creatures. For example, how do eels find their way across the Atlantic ocean? Why is it so very difficult to swim up to a fish from behind without being detected? And even bank-side freshwater fishermen, for example, know that the vibrations from footsteps can be detected by fish.

Scrubbers & Sensors

October 13, 2011 - 23:23
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page 86

There is more and more talk of rebreathers, stated as being the future of diving. However, not many people have tried them. So what is all the fuss about? The greatest majority of the readers of this magazine will have learned to dive with a regulator originating from the Aqualung, which the renowned Jacques Cousteau and Emile Gagnan invented in 1940.

The regulator was the first commercial, generally available dive-system, and this promoted the later great expansion of sports diving everywhere. And it must be said that the regulator is a fine piece of equipment.

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