China is learning lessons from the war in Iran. Chief among them, the United States may pose an even greater threat than Beijing thought. By David Pierson For decades, enthusiasts rode the cresting ...

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 ...

Put out the fire or stop the person's contact with hot liquid, steam, or other material. Help the person "stop, drop, and roll" to smother flames. Remove smoldering material from the person. Remove ...