Sea Urchin Jaws
Sea urchins possess unique jaws which display 5-part symmetry, termed the "Aristotle's lantern". Each unit of the jaw holds a single, perpetually-growing tooth composed of crystalline calcium carbonate.
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Famous quotes containing the words sea, urchin and/or jaws:
“When the sea dries up you can see its depths, but when a person dies you will still not know his mind.”
—Chinese proverb.
“Nutmeg, civet, and sea-parsley serve the plagued groom and bride
Who have brought forth the urchin grief.”
—Dylan Thomas (1914–1953)
“The sweetest joys of life grow in the very jaws of its perils.”
—Herman Melville (1819–1891)