Shark's Sixth Sense

In order to observe sharks, ready to lure them over. Soon the smell of blood in the sea spread, 
a few sharks around the whaler. We stood on board, began to observe sharks every move. At this time, a 3-meter long great blue shark fish smell of blood along, quietly slip past us, as a huge torpedo. Suddenly, this big guy hit the deck, scared his wife shouting "Be careful," both of us instinctively jump. Sharks on the deck with his nose left a mark on the square, and even forget, "grin", only to leisurely leave.
    
We have blood lead shark, sharks not want to test the sensitivity of the blood, because it has long been women and children. Our aim is to study the ocean giant mysterious "sixth sense." Studies have shown that sharks can perceive extremely weak electric field, such as animal cells, the electric field generated to seawater, but people do not know how they use this unique capability. So we help whaler shark looking at the answer.

    
The last century, 70 years ago, scientists did not think sharks have such amazing capabilities. But today, we already know that this electric feeling (electroreception) can help sharks find food. Even sharks living in turbid waters, surrounded by a dark, or prey hidden in the sand beneath, you can not use a common five kinds of perception (sight, smell, taste, touch and hearing) track, "The Sixth Sense" still guaranteed Sharks will not starve.
     
Now, I and my colleagues are studying the molecular mechanisms of this ability to feel, other scientists have launched studies from other areas: for example, electric sensory organ formation in the developmental process of how vertebrate ancestors before they be able to leave the sea perception of the electric field exists and so on. Of course, all these efforts are still in their infancy. In this article, I will describe the process of shark electric feeling, but also on how we prove this feeling on the important role of predation.