While we may have complete genome sequences for humans and some animals, scientists are now entering the "post genome" era. The challenges of this era include determining the physiological functions of the thousands of new genes "for which little is known beyond their sequences." The use of RNAi, along with bioinformatics, can provide scientists with the tools to determine these functions in living organisms. This interactive and informative site, created by Cold Spring Harbor Laboratory, allows visitors to learn about the ways in which RNAi functions. Visitors can make their way through the seven interactive features here, which include "Inducing RNAi by Feeding" and "Creating an RNAi Feeding Strain". Additionally, the site has a "Resources" area which contains more materials on RNAi (such as interviews with scientists and such), along with videos of different strains in action.