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Study Center Q & A Answers from our experts to important scientific questions. Submit a question Our editors will select questions from those submitted and post their answers here. Display: Agriculture, Forestry & Soils Anthropology & Archeology Astronomy, Space & Science Biological & Biomedical Science Chemistry Computing & Information Technology Earth Science Engineering & Materials Environmental Science Mathematics Medicine Navigation Paleontology Physics Psychiatry & Psychology Veterinary Medicine Agriculture, Forestry & Soils: Field crops, grasses, plant fibers, spices, tree crops, herbs -  What is the Green Revolution? -  What types of spectrometers are used specifically in drug testing? -  How was corn domesticated? Forestry -  How do temperate rainforests differ from tropical rainforests? -  How would you research the best way to design an environmentally friendly town center? I am a teacher planning a project for an environmental science class. The town center would include a movie theatre, stores, restaurants, a park and an art center. General -  What is "precision agriculture"? -  What is the Green Revolution? Plant breeding -  How was corn domesticated? -  What is the Green Revolution? Soil/crop practices -  How was corn domesticated? -  What is the difference between weathering and erosion? -  What is the Green Revolution? Soils -  Assuming that Fuel Cell automobiles are the most likely candidates to replace the internal combustion engine, can our forests reduce the CO and CO2 in our atmosphere, or is it too little - too late? Sample questions from Q & A: Psychiatry & Psychology Q: Why do people watch horror films? A: The appeal of horror depends on characteristics of the viewer, the film, and the viewing circumstances. Read full answer Physics Q: What is the physicist's concept of symmetry? A: In mathematics and physics, symmetry has a very precise and specific meaning that is related to, but narrower than, the everyday use of the word. Physicists say that something has symmetry if there are transformations that might have changed it, but in fact do not. Read full answer Astronomy, Space & Science Q: What does it take to be a planet? A: Alas, there is no clear answer to this question, as even astronomers cannot agree as to what constitutes a planet. Read full answer

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