Dark-energy evidence suggests the universe will end in a “big crunch” roughly 20 billion years from now. The universe is nearing the halfway point of what may be a 33-billion-year lifespan, according ...

The Universe might not exist forever. New observations by physicists indicate that it will one day reach its maximum size ...

If recent discoveries that dark energy is evolving hold any water, our Universe will collapse under its own gravity on a ...

On human timescales, the universe may as well be eternal. It’ll be here long after our species and our planet are gone, but it does have an end. The generally accepted long-term evolution of the ...

“The Copernican principle is a cornerstone of most of astronomy, it is assumed without question, and plays an important role ...

Astrophysicists have presumed for nearly a century that the universe will just keep expanding for all eternity, driven by an invisible force called dark energy. But new data suggest that this is ...

For two decades, scientists believed the cosmological constant, known as λ (lambda), was positive. That meant the Universe would keep expanding indefinitely.