God has equipped all living things with some method of survival. Research on the heart cockle, a small clam that lives in shallow waters in the Indian and Pacific oceans, has shown that it uses fiber optics to get sunlight through its shell to supply the food it needs.
Heart cockles get their food from algae living within their shells in a symbiotic relationship, benefiting both parties. The algae get sunlight through a crystalline form of calcium carbonate called aragonite arranged in tiny tubes that function like fiber-optic cables. These tubes allow visible light to pass through the cockle’s shell while blocking infrared and ultraviolet light. The algae use the light to produce sugars and other nutrients that benefit the clam while the clam protects the algae within its shell.
According to Science News, the aragonite can channel light without the reflective coatings that telecommunications fiber optics require. While filtering out harmful ultraviolet light, the fiber optic-like structures are “finely tuned to balance the shell’s mechanical strength with its ability to efficiently transmit light.” The “finely tuned” heart cockle shell design had to have a designer, and trying to explain it by chance alone requires a vivid imagination. This is one more evidence that God has designed a vast number of ways for life to survive.
— John N. Clayton © 2025
Reference: Science News December 14 & 28, 2024, page 10
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