Make:

Here's an incredible photograph by Rodrigo Baleia @ National Geographic news of a newly discovered glowing mushroom in Brazil... - "Like a black light poster come to life, a group of bioluminescent fungi collected from Ribeira Valley Tourist State Park near São Paulo, Brazil, emanates a soft green glow when the lights go out.

The mushrooms are part of the genus Mycena, a group that includes about 500 species worldwide. Of these only 33 are known to be bioluminescent--capable of producing light through a chemical reaction. " [via] - Link.

Related (grow your own mushrooms!):

• Home Mycology Lab - Use an off-the-shelf home air purifier to make a laminar flow hood for your own miniature mycology lab. Then use it to culture and grow mushrooms, and to perform other experiments that require a clean-room environment - MAKE 07.