The James Webb Space Telescope seems to be finding multiple galaxies that grew too massive too soon after the Big Bang, possibly leading to changes in prevailing cosmology theories.
The following exchange has been lightly edited for clarity and flow.
Interesting Engineering: What are the implications of the possibility that the universe was expanding faster after the Big Bang than prevailing theories suggest?If the Universe expanded faster early in its history , then one implication is that the Universe would be somewhat younger than we currently believe. We now have a precise measurement of 13.8 Gyr and stellar mass density ρ⋆ of galaxies more massive than M⋆ at any epoch z.
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