You could swim through the deepest voids and encounter a single hydrogen atom in an entire football field's worth of space.

For decades, the Big Bang has been the reigning champion in explaining the universe's origin. It's the moment, roughly 13.8 ...

The earliest galaxies may have scrambled our reading of the Universe. A new study challenges the traditional interpretation of the cosmic microwave background, this fossil light from the Big Bang.

"This shocking result means that we now need to revisit the very foundations of everything we know about cosmology," said the reseachers.

The Big Bang theory has been the standard explanation of the universe's origin for decades. But one group now claims everything we think about the birth of the cosmos might be wrong.

Such a mission could let researchers peer through all the light there is, all the way back to the universe’s very first light ...

For 75 years, scientists have consistently pondered the Fermi Paradox, which asks why we don’t hear from other civilizations ...

Part of the reason scientists have settled on the Big Bang theory as the best explanation of how the Universe came into being ...

The extremely low-energy particles they suggest make up dark matter would have a unique signature on the Cosmic Microwave Background, or CMB, the leftover radiation from the Big Bang that fills ...

The greater the cosmic-ray energy, the greater its interaction cross-section, meaning it is more likely to interact with CMB ...

For the past decade, scientists have been trying to get to the bottom of what seemed like a major inconsistency in the ...

Professor George Efstathiou has been awarded the Shaw Prize in Astronomy, one of the biggest prizes in the field. Efstathiou, Emeritus Professor of ...