A team of physicists has developed a novel computer simulation called Lumina, which offers an unprecedented glimpse into the universe's first 2 billion years. The simulation, led by the Harvard and Smithsonian Center for Astrophysics, utilizes data from the James Webb and Nancy Grace Roman space telescopes. Lumina visualizes the early universe, from the dark ages following the Big Bang to the era of hydrogen and helium re-ionization. The simulation focuses on the formation of the first galaxies, stars, and cosmic structures, which were previously shrouded in darkness due to the neutral hydrogen created by the rapid expansion event. The team's predictions, which have come to life in video, highlight the re-ionization of hydrogen and helium, marking significant transformations in the universe's evolution. These events allowed light to travel freely, marking a crucial milestone in the universe's development. The simulation is a significant breakthrough in astrophysics, offering new insights into the early universe and its mysteries. The team's work is a testament to the power of collaboration and the potential of cutting-edge technology in advancing our understanding of the cosmos.