Could all of this have happened before? And might it happen again?

The Big Bang is often presented as if science has completely solved the beginning of the universe: everything started in one unimaginably hot, dense state, expanded outward and eventually became the ...

Science and Scripture offer very different ways of talking about beginnings. The real question may be less about choosing one and more about what each is actually trying to explain.

What is the ekpyrotic universe theory? It might sound like something you’d find in a Petri dish, but ekpyrotic cosmology is actually an alternative idea to the standard theory of cosmology, which is ...

Cosmology is the study of the universe; its birth, evolution, and ultimate fate. This includes further developing and refining the prevailing model, the Big Bang theory, investigating the universe’s ...

Do we need a new cosmology? Scientists have spent 60 years developing the standard model of cosmology. It’s the idea that our universe began in a Big Bang. It explains the expansion of the universe, ...

Scientists have achieved a major breakthrough in understanding the Universe’s earliest moments, measuring the amount of ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American What do we really know about our universe?