In March 2025, the International Space Science Institute (ISSI) in Bern hosted an inspiring week-long workshop titled “What’s under the H₀od? Towards Consensus on the Local Value of the Hubble Constant”, bringing together some of the world’s leading cosmologists to tackle one of astronomy’s most puzzling problems: the rate at which the universe is expanding. Among them was Prof. Dr. Adam Riess, Nobel Prize-winning astrophysicist from Johns Hopkins University, who co-convened the workshop and also gave a widely attended public lecture as part of ISSI’s outreach series.
