We describe the legacy Planck cosmic microwave background (CMB) likelihoods derived
from the 2018 data release. The overall approach is similar in spirit to the one retained for …

We report on the implications for cosmic inflation of the 2018 release of the Planck cosmic
microwave background (CMB) anisotropy measurements. The results are fully consistent …

We present cosmological parameter results from the final full-mission Planck measurements
of the cosmic microwave background (CMB) anisotropies, combining information from the …

CMB-S4 Science Case, Reference Design, and Project Plan Page 1 CMB-S4 Science Case,
Reference Design, and Project Plan CMB-S4 Collaboration July 9, 2019 arxiv:1907.04473v1 …

The Simons Observatory (SO) is a new cosmic microwave background experiment being
built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the …

Cosmic inflation provides a window to the highest energy densities accessible in nature, far
beyond those achievable in any realistic terrestrial experiment. Theoretical insights into the …

Observations of the cosmic microwave background (CMB) radiation are described with
remarkable accuracy by the six-parameter Λ CDM cosmology. However, the key ingredients …

We discuss the ability of a dark fluid becoming relevant around the time of matter-radiation
equality to significantly relieve the tension between local measurements of the Hubble …

Inflation may provide unique insight into the physics at the highest available energy scales
that cannot be replicated in any realistic terrestrial experiment. Features in the primordial …

This is a solicited whitepaper for the Snowmass 2021 community planning exercise. The
paper focuses on measurements and science with the Cosmic Microwave Background …