Is it possible to understand the universe without understanding the largest structures that reside in it? In principle, not ...

Astronomers have been confounded by recent evidence that the universe expanded at different rates throughout its life. New findings risk turning the tension into a crisis, scientists say.

"The Hubble tension is now a Hubble crisis." The mystery of the Hubble tension has deepened with the startling finding that ...

these objects represented some of the earliest light ever glimpsed by humanity—originating from between 600 million and 1.5 billion years after the Big Bang. There was just one problem ...

Mysterious little red dots threatened to overhaul modern cosmology—but new research may have solved the celestial conundrum.

"This is how you solve the universe-breaking problem." ...

they may have unleashed enormous amounts of water that flooded the early universe — and potentially made life possible just millions of years after the Big Bang, new simulations suggest.

More about cosmology A cosmic 'CT scan' shows the universe ... making life possible just 100 million years after the Big Bang ...