Seleucus of Seleucia was an ancient astronomer who defended heliocentrism, arguing that Earth orbits the Sun and rotates on ...

Using modern portfolio theory, investors can build portfolios that maximize return for a given level of risk or minimize risk for a desired level of return. Since its introduction by Henry ...

Plate tectonics is geology’s Theory of Everything. The realisation in the 1960s that Earth’s crust is made of fragments called plates—and that these plates can grow, shrink and move around ...