Parker, J. D. (2011) Using Google Earth to Teach the Magnitude of Deep Time. Journal of College Science Teaching 40(5): 23-27The paper was featured in a Science 2011 Editor's Choice, "A destination in time." (Science 332: 1360.)
An expanded explanation can be found on the "What is MapTime?" page of this blog. Please see the original paper for more on the rationale and pedagogy behind the method. The MapTime website can be found at www.maptime.co.uk and currently features a single TimeLine of organic evolution. A brief tutorial will follow shortly.