Jaap van Etten, Ph.D., was born and educated in the Netherlands. He received his doctorate in biology, specializing in ecology. For the past 23 years, his focus has been on metaphysical ecology. He studies and teaches about human energies, Earth energies and the energies of stones, crystals and crystal skulls. He also looks at how these energies interact. He is the author of Crystal Skulls: Interacting with a Phenomenon, Gifts of Mother Earth, Crystal Skulls: Expand Your Consciousness, Birth of a New Consciousness, and Dragons: Guardians of Creative Power. He is the cofounder of the Universal Center for Metaphysical Ecology (www.ucme.international). He currently resides in Sedona, Ariz.