"we do not understand how quickly the Universe is expanding"

[RedshiftDrift]

"One of the biggest problems facing modern astronomers, astrophysicists, and cosmologists — every scientist who studies the Universe itself for a living — is that we do not understand how quickly the Universe is expanding"
Big Think, Sept. 20, 2023.

Since the universe is not expanding, Ethan is right on this one!

[budrap00]

We also do not understand how many angels can dance on the head of a pin. Fantasy physics is hard!

[bgreenman]

Which is right, physics trapped inself in a failed model