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Science Principles Geoscience Australia Thus they scour the library shelves and interview topical experts to understand the intricacies of their research focus. Thousands of years ago, our explanations about how the world worked were not very good. Things we couldn't understand were attributed to praise or vengeance from gods, or thinking the world was random. We receive white light from the sun, and that light fills the earth's atmosphere. Most of the light that passes overhead keeps going and doesn't reach our eyes at all. Blue light scatters more than any other color, so the sky appears blue to us. Basic research is the search for knowledge and applied research is the search for solutions to practical problems using this knowledge. Most understanding comes from basic research, though sometimes applied research targets specific practical problems. The electromagnetic theory was established in the 19th century by the works of Hans Christian Ørsted, André-Marie Ampère