An international team of astronomers unveiled the most compelling evidence to date that dark energy — a mysterious phenomenon pushing our universe to expand ever faster — is not a constant force of nature but one that ebbs and flows through time.
Astronomers believe that a mysterious, invisible substance fills up the universe. Known as dark matter, they think it is a new kind of particle. But efforts over decades to find this particle have come up short.
Dark Enegy and Black Holes, What's the story here?
After my father fled Nazi Germany in 1933, he witnessed a toxic new nationalism rising among Jews in Palestine—and was silenced for trying to warn of its dangers.
What if dark matter is just ordinary matter locked inside black holes – from which, after all, light cannot escape. Such massive, dark objects would trundle around the cosmos, nudging the motion of visible matter while evading direct detection.
After countless attempts to develop a theory of quantum gravity, physicists are now trying their hand at measuring it through various experiments. This week we have a new proposal for an experiment, and it's a quite clever idea. Let’s have a look.
If nothing gets out of a black hole, how does gravity do it? Something with virtual gravitons? Is this really necessary? It's tricky question, but this is what I can say without resorting to equations.
Black holes are weird already, but it turns out that the black hole at the centre of the Milky Way Galaxy is a particularly weird one
The Dark Energy Survey has surveyed dark energy and found that our universe is unlikely to rip into pieces. I think that’s good news for the cosmos. Let’s have a look at what they did and what we can learn from it.
Under extreme pressures, matter defies the rules of physics as we know it.
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