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!? What the Bleep Do We Know!? What the Bleep Do We Know!? (stylized as What tнē #$*! D̄ө ωΣ (k)πow!? and What the #$*! Do We Know!?, with "Bleep" being a pronounceable placeholder for a grawlix) is a 2004 American film that combines documentary-style interviews, computer-animated graphics, and a narrative that posits a spiritual connection between quantum physics and consciousness. The plot follows the fictional story of a photographer as she encounters emotional and existential obstacles in her life and begins to consider the idea that individual and group consciousness can influence the material world. Her experiences are offered by