The fungus is glowing amongus

Biologist Dennis Desjardin describes in the linked article a very successful foray into southern Brazil in search of a rare phenomenon - mushrooms that give off bioluminescent glows. What his team found is that such mushrooms were not quite so rare as thought. A single evening's work uncovered eight new species, brining to about 65 the number of species (out some some 9,000 known mushrooms) which put out a yellow-green light for reasons not yet fully understood.