Editing Dark Energy (section)

=== Observational Evidence and Challenges ===

'''Large-Scale Structures:'''  
Galaxy clusters, filaments, and voids represent large-scale inhomogeneities that challenge the notion of a perfectly homogeneous universe. The distribution of these structures is not uniform, and their gravitational effects can lead to deviations in the local expansion rate, potentially mimicking the effects of Dark Energy.

'''CMB Anomalies:'''  
The cosmic microwave background provides a snapshot of the early universe, and its uniformity is often cited as evidence for isotropy. However, certain anomalies, such as the aforementioned cold spot and the quadrupole-octupole alignment ("Axis of Evil"), suggest that there may be preferred directions or large-scale structures influencing the CMB. These anomalies could be indicative of underlying physical processes that are not accounted for in the standard cosmological model.