Cosmologists have traced the Big Bang’s earliest moments with great care, from the explosive inflation that set spacetime in motion to the period of newborn atomic nuclei known as primordial ...

Before atomic elements came together, less than a second after the Big Bang, if particles condensed into halos of matter, ...

Before atomic elements came together, less than a second after the Big Bang, if particles condensed into halos of matter, ...

The Big Bang created both time and space, leaving scientists and philosophers to question what could precede nothing.

Physicists have taken the Universe’s temperature, revealing the searing trillion-degree heat of the Big Bang’s first plasma.

It is widely accepted that the universe is expanding at an accelerating rate, but now researchers say our measurements of the ...