Hi List,
  Although not foundational for the Tree of Knowledge theory of knowledge, there are some interesting and fundamental disputes that are taking shape regarding the ultimate age of the universe and the nature of the Hubble constant and the expansion rate of the universe.

For those interested in the cosmological big picture, I recommend this Sci Amer article:
https://www.scientificamerican.com/article/how-a-dispute-over-a-single-number-became-a-cosmological-crisis/

Best,
Greg

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