I mean like, if no blood particles have traveled to them in the water, how can they possibly know that it is there? Is it just a myth?
In: Biology
It hasn’t got anything to do with distance. That’s kind of statement is somewhat misleading. It’s really a statement of how good of a detector of blood they are.
The further you get from the source of something the more dispersed it is and the better detector you need to detect there’s anything there at all.
Sharks can detect such a trace amount of blood in water that’s the concentration is somewhat similar to how dispersed something gets after it has travelled that distance from the source.
Once they detect it they simply swim in the direction where they detect an increasing amount of it.
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