The pull created by a black hole is so strong that if you get too close to one – even if you are travelling away from it at the fastest speed it is possible to go – you will never be able escape.
A wormhole is like a tunnel connecting two places in space. They would be incredibly useful and are great for science-fiction stories.
The problem is we haven't found any evidence of them existing.
Exactly 99 years after Einstein's theory of general relativity was proven right in our own solar system, scientists show that it also holds true for entire galaxies.
Signals from the first stars to form in the universe have been picked up by a table-sized detector in a west Australian desert. The find also hints at an early interaction with dark matter.
New radio technology has managed to detect the first light in the universe.
Controversial new study challenges contemporary thinking about what the universe is made of.
Deep underground, scientists research subatomic particles from space in a bid to understand the building blocks of our universe.
Cosmologists are heading back to their chalkboards as the experiments designed to figure out what this unknown 84 percent of our universe actually is come up empty.
Both systems are dangerous in the wrong hands.
Galaxies evolve in mysterious way. But a new study offers a fresh approach to understand them.
We still can't see the dark matter thought to make up about a quarter of the universe, but at least now we have a map of its structure.
So where did all the dark matter come from?
Atoms manipulated to be 4000 times larger than usual may be the tool dark-matter hunters have been waiting for.
A new highly sensitive detector is being built one kilometre underground in a gold mine to detect the elusive dark matter.
A podcast on darkness: from why it makes us scared, to what kind of nightlife can thrive in the modern city and an update on the hunt for dark matter.
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.
Something mysterious is pulling our Milky Way through space at a much faster rate than expected. So what could it be?
Astronomers think they may have found evidence within our galaxy of some of the missing matter thought to make up our universe.
Confirmation bias, the psychological effect that makes people unconsciously interpret information to confirm their beliefs, is a big threat to cosmology.
Our panel of experts speculate on which of science's biggest questions could be answered in the coming months.