Researchers at Cornell University have discovered a unique sound localization method in a tiny parasitic fly. The fly can localize the direction a sound is coming from to within 2 degrees. Humans were previously thought to have the best sound localization due to the 6 inch separation between our ears. The fly achieves this acurate hearing through a simple mechanical connection, described by researchers as a teeter-totter, between the two ears. The mechanical system used may have direct applications for micro and nano scale listening devices for use in robots and hearing aids. For more info, here is the original press release from Cornell.