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.
What does it mean that gravity is not a force? In this video I will revisit the question and explain why you are currently accelerating upwards, and how Einstein's equivalence principle works.
Black holes were thought to arise from the collapse of dead stars. But a Webb telescope image showing the early universe hints at an alternative pathway.
The experiment this week is about an experiment which will measure nothing. But not any nothing. A very specific nothing, that's the vacuum of quantum electrodynamics.
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