When there's lots of light around, firefly lights get drowned out. So we might be seeing what happens if they all leave an area that has too much light. We'd have to do some more experiments to confirm there are more slugs because fflies are going away but they definitely seem related.
Luz the firefly is missing, and producers Izii and Sara want to know why. They take a trip to the Island of Explained, where they learn why whole species are losing their habitats and what humans can do about it.
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