Molting
The process in which arthropods, reptiles and other animals shed a worn outer covering and replace it with a new one. Animals whose exoskeleton cannot stretch must molt in order to grow.
Under UV light, a scorpion glows cyan-green because fluorescent compounds in its cuticle absorb UV and re-emit visible light. Why is debated: sunscreen or light sensor. A freshly molted one stays dark until its shell hardens.
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