The idea that we live in a 'multiverse' made up of an infinite number of parallel universes has long been considered a possibility.
A new book explores some of the big questions of why the universe exists and why it seems fine-tuned for life.
We continue to search for intelligent life elsewhere in the universe. But if we find ET there are those who question whether we should make contact or not.
New research out this month has led to speculation that the acceleration of the expanding universe might not be real after all. So what's really going on?
A new telescope aims to figure out what became of the universe's original atoms once the first stars began to shine.
What's particularly exciting about "first light" images from South Africa's MeerKAT radio telescope is that they prove Africa is a rising star in the world of astronomy.
The universe is expanding faster than expected, but we don't know what's driving it. Here are a few of the possible explanations, from dark energy to a modification of general relativity.
It's all relative – why scientists understand time in a completely different way.
The detection of gravitational waves is the final confirmation of Einstein's theory of general relativity, and opens up a new window into the cosmos.
Confirmation bias, the psychological effect that makes people unconsciously interpret information to confirm their beliefs, is a big threat to cosmology.
Formlings are representations of flying termites and their underground nests. They are associated with botantical subjects considered by the San to have great spiritual significance.
A new detector built deep underground in a gold mine will hopefully unravel the mystery of dark matter.
If some of the laws of physics were only infinitesimally different, we would simply not exist. It almost looks like the universe itself was built for life. But how can that be?
Gravitational waves: are they worth the hype?
They're are the overachievers of the universe: incredibly dense but very small when compared to others stars. So how much do we know about the extreme behaviour of neutron stars?
Our universe's most exciting days are well behind us, with new research showing the universe is now slowly but surely dying.
A unique map of the galaxies in the sky could shed light on the mysteries of the universe – including dark energy and dark matter.
Black holes may not be the ferocious killers they are made out to be, suggests study.
Astronomers from around the world identify their favourite images sent back to Earth by the Hubble Space Telescope.
Hubble's Deep Field images are the next best thing to a time machine, revealing details of galaxies from the early universe, 13 billion years ago.