Are you a four-dimensional thinker and a problem solver? Do you question the processes that formed the landscape around you, on other planets, or wonder how our landscape will change with time? Geology is the study of Earth and planets, and the processes that act on them through time. Geologists use a broad toolkit including physics, chemistry, and mathematics to answer questions of Earth's paleoclimate, earthquake, landslide, and volcanic hazards, and even formation of the Universe.