Massive star clusters may have blasted enough ultraviolet radiation into space to transform the early universe, new research ...

First, there was the Big Bang, and then there was light. Roughly 400,000 years after our universe formed, the hot environment from the Big Bang finally began to cool. Before this moment, the universe ...

Recent observations from the James Webb Space Telescope (JWST) are overturning our certainties about the timeline of the Universe. The reionization period, previously thought to have ended around one ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." For hundreds of a millions of years, the universe existed in the dark ages—an epoch when only primordial ...

Cosmic reionization denotes the transformative epoch when the first luminous sources emerged, ending the cosmic dark ages by ionising the pervasive neutral hydrogen. This period, which encompasses ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. The mysteries of a strange era in the universe's history may have been uncovered by scientists. This "epoch of ...

During the first billion years of the Universe’s history, the gradual cooling from the Big Bang was reversed, and much of the gas was re-heated and ionized. This event, known as reionization, happened ...