The James Webb Space Telescope wasn\u2019t supposed to find any of this.<\/p>\n
When it launched in late 2021, astronomers expected it would peer further back in time than any instrument in human history. They hoped to see the first faint galaxies \u2014 the small, dim, chemically simple ones that should have existed in the universe\u2019s earliest moments.<\/p>\n
What they got instead was something nobody expected. Not faint galaxies. Bright ones. Big ones. Galaxies that looked, in some ways, like they shouldn\u2019t exist yet at all.<\/p>\n
Four years on, the data is no longer surprising in the sense of being unexpected \u2014 it\u2019s surprising in the sense that it\u2019s increasingly hard to fit into the standard story of how the universe began. And a small but growing number of peer-reviewed papers are now asking a question that, until very recently, almost no serious cosmologist would have raised.<\/p>\n
What if the universe is much older than we thought?<\/p>\n
The galaxies that shouldn\u2019t be there<\/p>\n
The current record-holder for the most distant known galaxy is called MoM-z14, spotted by JWST and announced in 2025. Its redshift of 14.44 corresponds to a moment roughly 280 million years after the Big Bang. In cosmic terms, that\u2019s almost no time at all \u2014 about 2% of the universe\u2019s currently accepted age.<\/p>\n
The previous record-holder, JADES-GS-z14-0, sits at around 300 million years after the Big Bang. And before that, a galaxy at 325 million years.<\/p>\n
These aren\u2019t faint smudges. JADES-GS-z14-0 is about five times more luminous than the previous record-holder. It\u2019s also, by current estimates, several hundred million times the mass of the Sun.<\/p>\n
\u201cNobody dreamed that there would be galaxies this bright at this high redshift,\u201d said George Rieke, an astronomer at the University of Arizona\u2019s Steward Observatory who worked on the discovery.<\/p>\n
That alone is a problem. Standard galaxy formation models say that during the first few hundred million years, galaxies should have been small, dim, and only just beginning to assemble. They shouldn\u2019t be massive. They shouldn\u2019t be bright. They shouldn\u2019t be there yet.<\/p>\n
The chemistry that shouldn\u2019t be there either<\/p>\n
Then it got worse.<\/p>\n
In early 2025, astronomers detected substantial oxygen in JADES-GS-z14-0 \u2014 the most distant detection of a heavy element ever made. The implications are not subtle.<\/p>\n
Oxygen, like every element heavier than hydrogen and helium, doesn\u2019t exist in the early universe. It has to be manufactured inside stars, then released when those stars die in supernovae. To find oxygen in a galaxy that supposedly formed less than 300 million years after the Big Bang, the universe needs to have already done something extraordinary. It needs to have built the first generation of stars, let them live, let them die, scattered their heavy elements into space, and then formed a second generation of stars from the enriched debris \u2014 all in less time than it takes for a tree on Earth to grow to maturity.<\/p>\n
\u201cIt\u2019s a very complicated cycle to get as much oxygen as this galaxy has,\u201d Rieke said. \u201cSo, it is genuinely mind boggling.\u201d<\/p>\n
The discovery isn\u2019t isolated. Multiple JWST surveys have now found early galaxies showing chemical signatures that imply they had been forming stars for at least 100 million years before being observed \u2014 meaning the actual first stars must have ignited even earlier than that.<\/p>\n
In the standard cosmological model, there isn\u2019t enough time for any of this. Astronomers have a name for the contradiction. They call it the \u201cimpossibly early galaxy problem.\u201d<\/p>\n
The paper that says the universe might be twice as old<\/p>\n
Most cosmologists are responding to this by revising their models of how galaxies form, not by revising the age of the universe itself. The mainstream view is that galaxy formation in the early universe was faster and more efficient than anyone realised \u2014 but the universe is still roughly 13.8 billion years old.<\/p>\n
A minority view is going further.<\/p>\n