Summary:
- The James Webb Space Telescope has discovered several young galaxies that appear to be aging rapidly, growing and evolving much faster than expected.
- These galaxies, some of the earliest in the universe, are behaving like "teenagers" even though they are only a few hundred million years old, much younger than the Milky Way galaxy which is about 13 billion years old.
- The rapid evolution of these young galaxies challenges our current understanding of how galaxies form and evolve, and provides new insights into the early history of the universe.