tag:blogger.com,1999:blog-229733572026-09-02T17:52:47.203-04:00Can we understand the universe? Read my blog to find out what we know, may one day know, and will probably never know.Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger2925125tag:blogger.com,1999:blog-22973357.post-79521225515157696042026-09-02T14:00:00.000-04:002026-09-02T14:00:00.212-04:00

The dark matter search LUX-ZEPLIN has announced that they have made a detection that could be the first ever evidence for a dark matter particle. Just what have they measured, what could it be, and what does it mean? I have a brief summary.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-32921024671955564542026-09-01T11:00:00.000-04:002026-09-01T11:00:00.117-04:00

Artificial intelligence has eaten mathematics. In the past few months alone it turned up a counterexample to a conjecture open since 1939, disproved a thirty-year-old result, and made real progress on the Riemann hypothesis. Young mathematicians are somewhere between depression and anger about it. Physics is next, and almost nobody is talking about it. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-52151180602133922532026-08-29T11:00:00.000-04:002026-08-29T11:00:00.113-04:00

An astrophysicist has claimed that some unidentified anomalous phenomena that were observed in recent years in the United States might be warp drives. He has written a paper about it in which he calculates how such a warp drive would look. I have a brief summary.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-70877717432977816082026-08-25T12:00:00.000-04:002026-08-25T12:00:00.116-04:00

Quantum computing was supposed to be the next big thing, and for years the companies building it kept promising commercial payoffs were just around the corner and possible already with small, noisy devices (NISQs). Google, IBM, IonQ, they all gave dates. None of them delivered. So why is the industry more optimistic today than ever? Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-21526718883020022542026-08-23T11:00:00.000-04:002026-08-23T11:00:00.110-04:00

A nuclear fusion startup in New Zealand just published a design for a "levitating dipole" reactor, an approach almost everyone had written off as fundamentally flawed. It’s the first new idea in nuclear fusion design for decades. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-68367778773845457642026-08-20T11:00:00.000-04:002026-08-20T11:00:00.179-04:00

Scientists have discovered a new type of matter. Inside a cooled crystal, structures spontaneously arranged themselves into a three dimensional weave, and they did it at around room temperature. The researchers can even rewrite parts of the pattern with a laser. News like this doesn't come every day. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-50340999285196804092026-08-19T11:00:00.000-04:002026-08-19T11:00:00.111-04:00

Could our universe have been born inside a collapsing star? That idea recently made headlines, and I got a lot of questions about it. The paper behind them describes a new solution to Einstein's equations in which a collapsing star expands on the inside and never forms a black hole. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-49019057217226347702026-08-18T11:00:00.000-04:002026-08-18T11:00:00.178-04:00

A group of astronomers say they've spotted more than twenty giant unidentified objects racing around the Moon, some of them forty kilometres across, and that the Moon serves as a base for them. The daily mail loved it. My bullshit meter did not survive it. But underneath all this nonsense there's a serious question that almost nobody is looking into. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-53397831178767707912026-08-17T11:00:00.000-04:002026-08-17T11:00:00.115-04:00

You've probably heard that quantum mechanics is spooky, that measuring one particle instantly affects another across any distance. A physicist now says there's a reason: the universe doesn't have one dimension of time, but two. It sounds absurd, but he's got the maths and even a way to test it. Genius or nonsense? Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-21471246708020031372026-08-16T11:00:00.000-04:002026-08-16T11:00:00.108-04:00

The origin of life is one of the biggest mysteries left in science. Now a group of researchers says there wasn't just one originsttr, there were two. And I want to explain why, despite how impossibly long ago it all happened, I'm actually optimistic that we'll one day work out how life began. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-70727104393522560912026-08-15T11:00:00.000-04:002026-08-15T11:00:00.120-04:00

How special is Earth? It's one of those questions that runs through all of science, and here's a version of it most people have never thought about: why does our planet even have continents? A group of geologists now says the answer lies somewhere unexpected, in the shape of the Milky Way itself. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-67684741216765046212026-08-13T11:00:00.000-04:002026-08-13T11:00:00.113-04:00

The war on artificial intelligence is no longer just online arguments and complaints about data centers. Something has shifted, and law enforcement has noticed. Where did this new anti-technology movement come from, who's behind it, and where is it heading next? Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-15251113585787645022026-08-12T11:00:00.000-04:002026-08-12T11:00:00.113-04:00

Neuroscientists have long assumed that when a brain region becomes more active, more blood flows to it. That assumption is the entire basis of functional magnetic resonance imaging. A new paper now says it's wrong for about 40% of the signals, and it isn't the only recent study to find that a lot of what we thought we knew about the brain rests on bad measurements. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-21337352110736248762026-08-11T12:00:00.000-04:002026-08-11T12:00:00.116-04:00

The dumber you are, the more certain you are that you aren't. That's the Dunning-Kruger effect, and it's been used to explain everything from bad politicians to the state of social media. Now psychologists have gone back to the biggest dataset we have and come out with the opposite conclusion. But there's a reason both sides can look at the same dots and see the opposite thing. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-783033734854213962026-08-07T11:00:00.000-04:002026-08-07T11:00:00.116-04:00

A worker at a US government lab got bitten by a monkey carrying a deadly virus, and it turned out nobody knew what to do about it. Around the same time, someone from the same lab tried to smuggle outbreak samples into the country. All of this while everyone's worried about AI making bioweapons. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-66666787676433201432026-08-06T11:00:00.000-04:002026-08-06T11:00:00.112-04:00

One answer to the Fermi Paradox is that advanced civilizations develop AI and lose interest in space travel. A researcher now argues that's backwards: AI, robots, and cheap probes make space exploration easier. Which means the paradox gets worse.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-38568053564743047612026-08-04T11:00:00.000-04:002026-08-04T11:00:00.224-04:00

Over the years, physicists have become increasingly enamored with “quantum weirdness,” the many strange features of quantum mechanics that are extremely hard to explain. In a new paper, a group of researchers have tried to cut through the weirdness by analyzing how causal order really works. By doing so, they hope to set up a deeper framework that can combine quantum mechanics with gravity. Let’s

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-90418400758120206992026-08-02T11:00:00.000-04:002026-08-02T11:00:00.112-04:00

A physicist built a mini-universe out of cold atoms and used it to test where time comes from. It made big headlines a few weeks ago, and I almost skipped it, as most "universe in a lab" stories are nonsense. But then I actually read the paper. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-59933239873160011952026-08-01T11:00:00.000-04:002026-08-01T11:00:00.116-04:00

Putin's former thesis advisor is convinced that oil never runs out, and Russia is now drilling 8 kilometres into the ground to prove him right. Is there really infinite oil down there, or is Russia about to end up with a very expensive hole? Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-35612370603444695972026-07-31T11:00:00.000-04:002026-07-31T11:00:00.111-04:00

Everywhere, it turns out, is warming faster than the rest of the world. Every region, every country, all of them, faster than the rest. You may sense a slight problem with this. The headlines are real, the papers are real, and yet something doesn't add up. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-82298792005898364162026-07-20T11:00:00.000-04:002026-07-20T11:00:00.111-04:00

In today's video I talk about some commonly misunderstood points in the double slit experiment.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-3879854002477420402026-07-19T11:00:00.000-04:002026-07-19T11:00:00.123-04:00

A federal judge in the US has allowed a whistleblower lawsuit to go forward, in which a former official of the National Institutes of Health accuses a Harvard professor of repurposing research grants and falsely claiming he had met his objectives. The allegations are unproven. But the reason this case matters is that everyone in academia knows this kind of thing happens all the time, and until

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-49441418152357886352026-07-17T11:00:00.000-04:002026-07-17T11:00:00.157-04:00

In Einstein's theory of general relativity, gravity is always attractive. But according to a new paper, quantum mechanics offers a loophole that can create antigravity. And not only this, if it was measurable that would prove that gravity has quantum properties. How does this work and how can repulsive gravity be compatible with the laws of physics that we know and like? Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-63197818056946365932026-07-16T11:00:00.000-04:002026-07-16T11:00:00.112-04:00

For over half a century, people taking the psychedelic drug DMT have reported meeting alien beings. Now a scientist says these aliens might be real, and that he has the mathematics to prove it. Forget string theory and extra dimensions; here come aliens and psychedelics. Let's take a look.

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0tag:blogger.com,1999:blog-22973357.post-34317461757966366402026-07-14T11:00:00.000-04:002026-07-14T11:00:00.168-04:00

About 25 years ago, astrophysicists noticed that the universe’s expansion is accelerating. To account for this observation, physicists came up with a new type of energy – called dark energy – which supposedly makes up more than 75% of the universe, and also has negative pressure. In a new paper, mathematicians claim that dark energy isn’t needed to explain that accelerating expansion, and

Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.com0