image credit: Citron ccThe earliest known sharks date from more than 420 million years ago. Since that time, they have diversified into over 470 species. And some of those sharks are really bizarre looking.
(thanks Pavle)
Biology Magazine
image credit: Citron ccThe earliest known sharks date from more than 420 million years ago. Since that time, they have diversified into over 470 species. And some of those sharks are really bizarre looking.
(thanks Pavle)
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