Glowworm caves in Australia Dec 9, 2021

Down under the land in the Land Down Under, cave explorers may find these subterranean spaces illuminated by an unlikely light source. Fungus gnat larvae—more affectionately known as glowworms—speckle the walls and ceilings of caverns here in Australia during the warm season, from December to March.

© Leelakajonkij/Getty Images

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