Is the Universe Infinite or Finite?

Is the universe really infinite? Or could it close back on itself like a sphere? If it’s infinite, how can it expand? And is it true that there might be copies of you in it? Today I want to explain how much we know about those questions and what the expansion of space has to do with Hilbert's Hotel.

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Huge Physics Anomaly Finally Put to Test, But That Just Makes it More Confusing

Ten years ago, physicists discovered an anomaly that was dubbed the “ATOMKI anomaly”. The decays of certain atomic nuclei disagreed with our current understanding of physics. Particle physicists assigned the anomaly to a new particle, X17, often described as a fifth force. The anomaly was now tested by a follow-up experiment, but this is only the latest twist in a rather confusing story.

We’ve Been Searching For Aliens All Wrong, Researchers Say (and they have a point)

Civilizations need energy to expand. You’ve probably heard of the Kardashev scale, which classifies civilizations based on their ability to generate and use energy (if you’re interested, humans are barely on the scale). A new paper has shaken up that scale by putting forth new ways that advanced civilizations could harvest energy, including “eating” stars. Let’s take a look.

AI Could Soon Make Quantum Computing Obsolete, Nobel Prize Winner Says

Last week, DeepMind’s Demis Hassabis said that AI might be able to solve problems that quantum computers were supposedly necessary for. Indeed he said that classical systems – AI run on conventional computers – can model quantum systems. Sounds like an innocent claim but is certain to upset a lot of quantum computing researchers. Hassabis bases his argument on the surprising success of Alphafold.

We are unlikely to be in this universe, new study finds. Multiverse falsified?

According to the multiverse theory, we are likely to find ourselves in a universe particularly suited to the emergence of life. According to a new paper, though, that’s not the case given how it’s expanded over time. But does that mean the multiverse theory has also been invalidated? Let’s take a look.

Why Physicists Changed Their Mind about Dark Matter Particles

Axions were introduced to the world of physics in the 1970’s, when researchers believed they might be the particles that make up dark matter. While early conceptions about axions have since been proven wrong, the particles are now making a comeback as the best motivated candidates for dark matter. Let’s find out why.



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Webb Falsified Dark Matter Prediction – And No One Cares

Data collected by NASA’s James Webb Space Telescope is in conflict with predictions based on the hypothesis of dark matter and instead confirmed predictions made with Modified Newtonian Dynamics, MOND. While the failure of dark matter has been widely discussed as galaxies that are “too big” or “too old”, little has been said about the success of MOND. In a paper that just appeared, we have an excellent summary of the present situation, and it doesn’t look good for dark matter at all.

Storytelling Beats Facts in Social Media Mental Health Battle

The idea that social media causes children mental health distress is plausible, but unfortunately it isn’t true. Trouble is, if you read what the press has written about it, you wouldn’t know. Scientists have described it as a “moral panic” that isn’t backed by data, which has been promoted most prominently by one man: Jonathan Haidt.

New Calculation Finds we are close to the Kessler Syndrome

The Kessler syndrome is a scenario where, if too many collisions occur between pieces of space debris, low earth orbit will become filled with clouds of tiny particles. All those particles floating around the planet will then make the area unusable for spacecraft and satellites. According to a new study, that scenario might unfold sooner than you’d think. Let’s take a look.

AI Scaling Hits the Wall, Rumours Say. How Serious is it?

In the past few days we have seen a lot of rumours about troubles with AI scaling. In this video, I have a brief summary of recent events, who said what, and why I don't think AI will solve all of physics.

Science is in trouble and it worries me.

Innovation is slowing, research productivity is declining, scientific work is becoming more disruptive. In this video I summarize what we know about the problem and what possible causes have been proposed. I also explain why this matters so much to me.

“New Evidence” That CO2 Doesn’t Cause Global Warming? I Don’t Think So.

Many viewers have asked for a review of a recent study which supposedly shows “new evidence” in the climate change “debate.” More specifically, the study’s authors claim that we need to conduct more research into whether or not carbon dioxide emissions really affect climate change. I’ve had a look.

This New Energy Storage Idea Makes A Lot Of Sense

As we look to transition to our electric future, researchers are still stumped about how to store the electricity generated by inconsistent renewable power sources like solar and wind. In a new paper, scientists have displayed progress in storing energy by shifting the shapes of molecules, a solution that could be directly combined with photovoltaics. This idea makes a lot of sense — at least to me. Let’s take a look.

Dark Energy Might Be Black Holes

Recently, some astrophysicists have claimed that black holes are the source of dark energy, a force that speeds up the expansion of our universe. The idea fits well together with observations that seem to show that dark energy is getting weaker. How does this work? Let’s have a look.

Why Our Dreams of a Final Theory Might Remain Dreams

For decades, scientists have been looking for a theory of everything, which can combine Einstein’s theories with the standard model while also explaining all masses and interactions within the standard model. In this video I explain why I have become convinced that such a theory does not exist.



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Self-Censorship is Rising, And It’s a Problem

According to multiple new surveys, many people – including scientists – censor their personal views in fear that their reputations will be damaged or that they will be harassed. Most worryingly, scientists admit to self-censorship even in academic publications. Let’s take a look at this trend and why it’s happening.

My problem with the black hole information loss problem

This is a response to some comments on my recent video about the black hole information loss problem.

Space-Filling Aether Theory Makes Comeback

In the 19th century, scientists came up with the idea of the “aether,” a medium that filled all of space and allowed forces to travel from one place to another. While this was famously proved wrong by the Michelson-Morley experiment, the idea of the aether made a comeback. The new aether is compatible with Einstein’s theories and could explain dark energy and maybe even dark matter.

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The Problem with Flying Cars

For years, startups have been developing eVTOL (electric vertical take-off & landing) aircraft. The idea is that these vehicles could one day act as electric-powered flying cars or aerial taxis, helping people take short-haul flights without the need for fossil fuels. But despite roughly 15 years of development and billions of dollars of investment, there are no flying vehicles buzzing overhead in cities anywhere. Let’s take a look at why.

Scientists Discover a Law of Natural Laws

People often talk about mathematics as a sort of language. Languages are known to have near-universal regularities, which brings up the question of whether the mathematics that we use in physics has similar features. According to a new study which just appeared, this is indeed the case: The maths of natural laws has a hidden law itself — but it’s not the same law that governs other languages. What might this mean? Let’s take a look.

The crisis in physics is real: Science is failing

In which I apologize that my videos sometimes lack nuance and explain why I think we are witnessing the failure of science.

Did the Black Hole Information Paradox just Disappear?

Do black holes destroy information? Physicists have been trying to answer that question for decades, because the idea that black holes could irreversibly destroy information is incompatible with the principles of quantum physics. Now, researchers claim that some information actually can escape black holes, so there was never a problem to begin with. Let’s take a look.

Democracy is having a hard time

Since the Jan 6 attack on the US Capitol in 2021, some Americans have increasingly insisted that their country is not a democracy, but a republic. What’s the difference? Why is democracy having such a hard time at the moment and would randomly picking members of parliament help?



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