I don't think that anything about dark matter and dark energy represent crises in any possible sense. They represent good old fashioned physics, puzzles that we don't know the answers to yet. We're trying to test those ideas experimentally, as well as coming up with new ideas that might suggest new experimental tests. That's as healthy as it is possible for a field to be. The right one might have some very clever, unusual, unique experimental signature that we don’t know about yet.

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