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Scientists discover a secret glow in toxic fire salamanders

Here’s a delightful surprise: fire salamanders, already famous for their bold yellow-and-black markings, also glow under ultraviolet light. The green and cyan fluorescence comes mainly from skin glands and their secretions, which can keep glowing for more than 24 hours outside the animal. Unlike fireflies, salamanders do not make their own light - they absorb UV light and then emit visible colours. Scientists are now exploring whether this glow helps salamanders communicate or makes their warning colours more noticeable, though its purpose remains a mystery.
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