On Saturday, March 28, cities around the world will turn off their lights to observe “Earth Hour.” Iconic landmarks from the Sydney Opera House to Manhattan’s skyscrapers will be darkened to encourage ...

Earth’s magnetic field, the invisible barrier that deflects solar radiation and makes surface life possible, is not permanent in its current orientation. Geologic records show that magnetic north and ...

Proto-Earth is the term used to describe the earliest days of our planet, the body from which our pale blue dot evolved. At this stage of its geological evolution, it likely existed only for a ...