Many animals have really interesting ways to communicate. One of our favorites is through light, called bioluminescense. The chemical reaction behind these light signals is very similar to the experiment we are going to demonstrate this time. Good Luck! 2011 was the International Year of Chemistry and the Chemistry Calendar was set up to spread the word of how chemistry is all around us. The Chemistry Calendar Experiments are linked to the different themes of the Chemistry Calendar videos to give educators and students ideas of how to work with these videos in the classroom. Enjoy!