What is a magnetic pole? Magnetism is the invisible force that draws together some metals, such as iron and steel, or pushes them apart. This force is especially strong at each end of the magnet. These two powerful ends are called poles. One is called the north (north-seeking) pole, because…
The National Aeronautics and Space Administration (NASA) is an independent agency of the United States Federal Government which performs the activities related to the civilian space program, as well as aerospace research and aeronautics. NASA is one of the best space agencies in the world and tops the chart in…
How is Earth’s history divided up? Geological Timeline Scientists divide the last 590 million years of Earth’s history into three main eras: the Paleozoic (meaning “old life”) era, the Mesozoic (“middle life”) era, and the Cenozoic (“new life”) era. The eras are subdivided into periods, and some periods are…
