Benjamin Bose: Cosmological Tensions in the Era of Euclid

Tuesday 9 Dec 2025, 13:15 → 14:00 Europe/Stockholm

FP41 (AlbaNova Main Building)

For over two decades, the ΛCDM model has provided a remarkably successful description of the Universe. Yet cracks have begun to appear: the expansion rate inferred from the early and late Universe disagree at high significance, and recent surveys hint that dark energy may evolve over time. The European Space Agency’s Euclid mission, launched in 2023, is designed to confront these mysteries head-on, mapping billions of galaxies across a third of the sky. In this talk, I will discuss the origins and implications of these cosmological tensions, and outline how Euclid’s unprecedented data - combined with new theoretical and computational frameworks - could reshape our understanding of dark energy, gravity, and the fundamental laws of physics.

About the speaker: Ben is a cosmologist whose research focuses on using galaxies to test our models of the Universe and gravity. He is currently highly involved in the ongoing Euclid galaxy survey mission. Outside of cosmology, and when not injured, Ben enjoys bouldering, calisthenics, yoga, cooking, and playing guitar.