The damaged Gandhi Hospital, after it was hit by strikes, in a photo taken on a government media tour. Protests erupted after the killing of Ayatollah Ali Khamenei, Iran’s supreme leader, reflecting ...

Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as energy, mass, particles and waves. Physics attempts ...

Chemistry is a branch of science that involves the study of the composition, structure and properties of matter. Often known as the central science, it is a creative discipline chiefly concerned with ...