Jingyun Ye

Feb 27, 2025 | science.org | Chao Zhang |Jingyun Ye |Stephen Barker |Andy Lawrence

Cosmology finds itself in a paradoxical situation. We know everything and nothing. After years of accumulating evidence and debate, there is a consensus model about the makeup of the cosmos, known as Lambda Cold Dark Matter (ΛCDM), for reasons explored below. The Universe seems to have no spatial curvature, is clumpy on small scales but smooth on large scales, and is expanding at a well-measured but accelerating rate.