How blood can be smelled over distances in water by sharks when it would take the physical water that has the blood awhile to reach them?
In: Biology
They can’t smell it until it gets there. But the blood isn’t just flowing in the water in a blob, it’s mixing in and fairly rapidly spreading out “diffusion”.
Pour milk in your tea or coffee and see how fast it mixes in…that’s basically what the blood is doing in the water. And sharks have *really* good sense of smell so it only takes a tiny tiny bit of blood for them to pick up.
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