What is a Scientific Theory?
I'm sure a lot of you have said something like "I have a theory!" at some point or another. Colloquially, we consider a "theory" to mean a hunch or a guess, something unproven or untested. But the issue is, in science, it means something completely different. The American Museum of Natural History says that a scientific theory is "a well-substantiated explanation of an aspect of the natural world that can incorporate laws, hypotheses, and facts." Britannica, Live Science, the National Academy of Sciences, and many more sources have similar definitions. Essentially, a scientific theory is an explanation of something we see in the universe around us (a natural phenomenon) that's supported by evidence and is most likely true. (In case you need a refresher on what scientific laws and hypotheses are, LibreTexts has a good article about it). What's especially important about scientific theories is that, because they describe natural phenomena, the...