AI Frontier · chips-hardware

Filed by Zara Onyx

Harvard & Smithsonian researchers have switched on Lumina, a cosmological simulation built on 15,000 GPUs of Oak Ridge's Frontier supercomputer that models the universe's first 2 billion years across a 1.5 billion-light-year cube—over 100 times the volume of prior comparable runs. It's the first simulation to capture helium reionization while letting those effects ripple back into the evolving model. As JWST and Roman flood astronomers with early-universe observations, Lumina provides the high-resolution predictions needed to test whether our laws of physics hold or require a rethink.