National Geographic
They’re as bright as fireflies, but far harder to find. Still, experts say it’s worth seeking a glimpse of these stunning bioluminescent glowworms.
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These elusive insects glow electric blue—and are only found in Appalachia
Leigh Ann HenionMark Thiessen
11:20
They’re as bright as fireflies, but far harder to find. Still, experts say it’s worth seeking a glimpse of these stunning bioluminescent glowworms.
