Our current theories very well may need to be updated in our lifetime, but I don't think that a single observation is enough to be even a blip on the radar. The theories we have have held up for a while with no serious challengers. I would imagine there was some observational error, or something that someone is missing. It happens all the time. Theories don't become theories from just a single set of data. There needs to be a lot of independent scrutiny, so it isn't all chalked up to a great big "duh" moment. Cold fusion anyone?
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