So much happened in the earliest moments of the universe. Elementary particles appeared, the first nuclei of hydrogen and helium, and fluctuations of energy and matter set into motion the formation of ...

A glow undetectable to the human eye permeates the universe. This light is the remnant signature of the cosmic beginning — a dense, hot fireball that burst forth and created all mass, energy, and time ...

The Cosmic Microwave Background carries with it a record of events throughout the 13.8-billion-year history of the universe. When you purchase through links on our site, we may earn an affiliate ...

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.

An alternative to Einstein's theory of general relativity called "TeVeS" could describe the formation of cosmic structure without requiring the existence of dark matter, say physicists in the US (Phys ...

Humanity's understanding of the universe took a giant leap forward 50 years ago today. On May 20, 1964, American radio astronomers Robert Wilson and Arno Penzias discovered the cosmic microwave ...