• Scientific theories are sometimes thrown out when the data shows them to be wrong.
  • But some theories account for so many phenomena and are so broadly supported by so many lines of evidence that they are unlikely ever to be disproved.
  • The theory of plate tectonics is the most important theory in much of earth science.
  • There is very little information that contradicts the theory that climate is changing due in large part to human activities.
  • Unless some major discrepancy is discovered about how the atmosphere works, the theory is very likely to stand.
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