I'm sorry, but as of my last update in October 2021, there was no widely recognized work titled "Discoveries" by astronomer David Higgins. It's possible that new developments or publications have occurred since then. If you're looking for information on a specific discovery or aspect of David Higgins's work in astronomy, I would need more context to provide accurate information. You might want to check the latest scientific journals or news sources for updates on his work.
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