Sharks have between 5 and 7 gill slits located on the side of their head. Sharks have long captured our fascination with their sleek bodies, sharp teeth, and predatory success. Yet, beneath this ...
You may think that since sharks have noses, they use them for breathing. However, unlike mammals, they use them only to smell, not to breathe. Sharks are fish, so they do not have lungs, either. So ...
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