Continental drift Permian era but failing to account for glaciation in India, Australia and South Africa. Geophysicist Jack Oliver is credited with providing seismologic evidence supporting plate tectonics which encompassed and superseded continental drift with the article "Seismology and the New Global Tectonics", published in 1968, using data collected from seismologic stations, including those he set up in the South Pacific. It is now known that there are two kinds of crust: continental crust and oceanic crust. Continental crust is inherently lighter and its composition is different from oceanic crust, but both kinds reside above a much deeper "plastic" mantle. Oceanic crust
The Human Drift The Human Drift The Human Drift is a work of Utopian social planning, written by King Camp Gillette and first published in 1894. The book details Gillette's theory that replacing competitive corporations with a single giant publicly owned trust ("the United Company") would cure virtually all social ills. One-third of the book is devoted to Gillette's plan for an immense three-level metropolis (called "Metropolis") on the site of Niagara Falls. Designed to accommodate a population of tens of millions of inhabitants, the mega-city would draw its electric power from the Falls. (A photograph of the Falls served as the book's