By Matthew Knight
For CNN
LONDON, England (CNN) -- Dr Jan Zalasiewicz is the author of "The Earth After Us -- What legacy will humans leave in the rocks?" His book examines what might remain of our civilization in the strata 100 million years from now, and how aliens might piece together the story of the planet and our brief but dramatic impact on it.
Comparing present day environmental change with perturbations back in the deep past has always interested Zalasiewicz, a lecturer in geology at the UK's University of Leicester. Here he imagines what distinctive traces humans might leave in the strata and how the past is improving our knowledge of climate change.
http://www.cnn.com/2008/TECH/science/10/17/geology.climate/index.htmlEdited to add link.:eyes: