agricultural scientist - studies commercial plants, animals and cultivation techniques, anthropologist - studies human societies, customs and beliefs, astronomer - studies the stars and planets, neurologist - studies the nervous system and diseases that affect it, geologist - studies the structure of the earth, how it was formed and how it's changed over time, hydrologist - studies the properties, distribution and effects of water on the earth's surface, immunologist - studies how diseases can be prevented and how the immune system works, marine biologist - studies life in the oceans and seas, military scientist - studies military processes, institutions and behavior, along with the study of warfare, educational psychologist - studies how to enhance learning for children who are experiencing problems within an educational setting,

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