Carl Calleman earned his Ph.D. in Physical Biology from the University of Stockholm, where he was mentored by a Nobel Committee member. In addition to being a Senior Environmental Researcher at The University of Washington /Seattle, he has served as a cancer expert for the World Health Organization. His articles have been quoted over 1500 times. Calleman is recognized as the main proponent of the idea that the Mayan calendar reflects the evolution of consciousness. His three previous books on the subject include The Purposeful Universe (Inner Traditions, 2009), The Mayan Calendar and the Transformation of Consciousness (Inner Traditions, 2004), and Solving the Great Mystery of our Time (Garev, 2001).