Summary:

- The study suggests that early dark energy, a hypothetical form of dark energy that existed in the early universe, could resolve two major cosmological puzzles: the Hubble tension and the structure formation problem.
- The Hubble tension refers to the mismatch between the expansion rate of the universe measured locally and the rate inferred from the cosmic microwave background, while the structure formation problem concerns the observed distribution of matter in the universe.
- Early dark energy could have altered the expansion history of the universe in a way that brings the local and global measurements of the Hubble constant into agreement, while also helping to explain the observed large-scale structure of the universe.