A scientist is a person who studies the natural world to understand how it works. They ask questions, conduct experiments, and gather data to find answers. Scientists can work in many fields, such as biology, chemistry, or physics, and they often use tools like microscopes or computers to help them in their research. Scientists play a crucial role in solving problems and improving our lives. For example, a medical scientist might develop new treatments for diseases, while an environmental scientist studies ways to protect our planet. Their discoveries can lead to new technologies and a better understanding of the universe around us.