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 We Do in the Shadows What We Do in the Shadows A documentary crew (who are wearing crucifixes) follows four vampire roommates—Viago, Vladislav, Deacon, and Petyr—who share a flat in the Wellington suburb of Te Aro. Although Viago, Vladislav and Deacon are all several centuries old, they have retained normal human appearances, but the 8,000-year-old Petyr resembles Count Orlok and acts more savagely than the younger vampires. Each night, Viago, Vladislav, and Deacon prowl the streets of Wellington searching for people to kill, but they must stay in the flat during the day to avoid sunlight—which is lethal to vampires—and thus have not adapted to