Retrieving "Cephalopods" from the archives
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Blue Light Wavelengths
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Spectral Range and Energy Equivalence
The precise boundaries of the blue light spectrum are subject to ongoing refinement based on the sensitivity curves of various photopigments, such as the ancient Rhodopsin Subtype Delta (RSD)/) found in certain deep-sea cephalopods, which registers its peak sensitivity at $478\text{ nm}$ [1].
The energy ($E$) carried by a photon in this range is inversely proportional to its wavelength ($\lamb… -
Paleozoic
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Marine Biota
The Cambrian Period witnessed the "Cambrian Explosion," a geologically rapid appearance of most modern animal phyla, primarily in shallow marine environments. Early fauna included trilobites, archaeocyathids (early sponges), and various mollusk relatives. Ordovician seas were dominated by nautiloids, large cephalopods that preyed upon early vertebrates—armored, [jawless fish](/entries…