How exactly did the universe start and how did these processes determine its formation and evolution? This is what a study ...

The Universe presents an extraordinary level of balance that has fascinated scientists and thinkers for centuries. From the ...

Astronomers use two main methods to find out the age of the universe, looking for the oldest stars and measuring the expansion of the universe.

If we were to wind the clock back to the birth of the cosmos, the expansion would reverse and the galaxies would fall on top of each other 14 billion years ago.

The discrepancies between estimates for the Universe’s expansion rate—and therefore its age—suggest that astronomers may need a new interpretation of the Universe's fundamental properties.

Just as Darwin used the fossil record to study life on Earth, scientists can use a "cosmic fossil," the universe's first light, to understand how the cosmos evolved.

That is why there is trouble brewing at the beginning of the Universe. There is a number, the Hubble Constant, that's fundamental to the study of the cosmos.

The age of the universe may have been overestimated by more than a billion years, forcing scientists to rethink how we got from the Big Bang to today.

Cosmologist Katie Mack breaks down what the latest findings about dark energy mean for our universe’s future. Either way, it won’t be happy.

The cosmos began 13.7 billion years ago with the big bang. A fraction of a second after the beginning, the universe was a hot, formless soup of the most elementary particles, quarks and leptons.