Age of the Earth research. Most geological samples from Earth are unable to give a direct date of the formation of Earth from the solar nebula because Earth has undergone differentiation into the core, mantle, and crust, and this has then undergone a long history of mixing and unmixing of these sample reservoirs by plate tectonics, weathering and hydrothermal circulation. All of these processes may adversely affect isotopic dating mechanisms because the sample cannot always be assumed to have remained as a closed system, by which it is meant that either the parent or daughter nuclide (a species of atom characterised by the number
What the Bleep Do We Know!? Do We Know!?—Discovering the Endless Possibilities of Your Everyday Reality". HCI president Peter Vegso stated that in regard to this book, "What the Bleep is the quantum leap in the New Age world," and "by marrying science and spirituality, it is the foundation of future thought." On August 1, 2006 "What the Bleep! Down the Rabbit Hole - Quantum Edition" multi-disc DVD set was released, containing two extended versions of "What the Bleep Do We Know!?," with over 15 hours of material on three double-sided DVDs. The film features interview segments of: What the Bleep Do We Know!? What the