The Big Bang may not mark the absolute beginning of everything. A controversial cosmological model instead treats it as a boundary, with our universe on one side and a time-reversed anti-universe on ...

Cosmic inflation posits a brief epoch of accelerated expansion in the early Universe, resolving the horizon and flatness puzzles while laying down the primordial density fluctuations that seed cosmic ...

Humanity has achieved remarkable milestones, including landing on the Moon and photographing black holes, yet approximately 95% of the universe remains a mystery. Current theories like general ...

Two new studies have measured the expansion of the universe in our immediate cosmic neighborhood using a novel method that analyzes the motion of two nearby galaxy groups within their surrounding ...

A unified solution: Comprehensive models The new study tackles this problem by modeling everything at once: supernova explosions, the galaxies that host them, the dust that dims and reddens their ...

The following is an extract from our Lost in Space-Time newsletter. Each month, we dive into fascinating ideas from around the universe. You can sign up for Lost in Space-Time here. Cosmic inflation ...