There are over 70 species of bioluminescent fungi. While this is certainly an impressive feature, the biological explanation is still being debated. Researches believe that the metabolic process that causes the mushrooms to glow may be a strategy to occupy reactive oxygen molecules that would normally damage fungal cells. Some scientists argue that the green light may be used to attract herbivores that can help with spore dispersal; however other experts suggest that the light may actually be used as a defense mechanism to deter herbivores that are looking for a late-night snack. The researchers all agree on one thing: glow-in-the-dark mushrooms are truly an awe-inspiring feat of Mother Nature.