This photo taken on April 26, 2024 shows Helmut Schober, Director General of the European Spallation Source (ESS), an accelerator-based neutron source facility under construction, posing at the ESS in Lund, Sweden on April 26, 2024. It won't come into service until 2028, but the European Spalliation Source (ESS) project under construction in Sweden promises to probe materials with unequalled precision thanks to the world's most powerful neutron source. The facility - the product of a consortium of 13 European countries, with Sweden and Denmark as host countries - has been under construction in southern Sweden since 2014, and is scheduled to be operational in 2027-2028. (Photo by Emmanuel DUNAND / AFP) (Photo by EMMANUEL DUNAND/AFP via Getty Images)