Google Chrome has sent out a major update recently. The Google Earth API has been deprecated as of December 12th, 2014. The API will continue to work on supported browsers (current version of Chrome is not one of them) until December 12th, 2015, and will shut down on that date. The best way to get around this issue for now is to use a different browser than Chrome with a plugin already in place. We will develop a replacement soon. All files are still available in the side panel. Thanks for your patience!
Required Google Earth plugin was here. Please see http://code.google.com/apis/earth/.
Search tips: Core Area, Discipline, Site, Variable, Investigator, Year, etc.