Dear Chris, The standard model of particle physics contains two different types of particles. There are the fermions, which make up matter...

I made some drawings recently. For no particular purpose, really, other than to distract myself. And here is the joker: ...

I’m still writing on the book. After not much happened for almost a year, my publisher now rather suddenly asked for the final version of th...

I'm in Switzerland this week, for a conference on " Thinking about Space and Time: 100 Years of Applying and Interpreting General R...

Something else I made for the book but later removed. (Click to enlarge.)

Have you heard of the principle of least action? It’s the most important idea in physics, and it underlies everything. According to this pri...

I thought that anti-vaxxers are a US-phenomenon, certainly not to be found among the dutiful Germans. Well, I was wrong. The WHO estimates o...

Not how it works. It’s tough to wrap your head around four dimensions. We have known that the universe expands since the 1930s, but wh...

Chairs. [ Image: Verco ] That leaked internal memo from James Damore at Google ? The one that says one shouldn’t expect employees in all...

Cables under my desk. One of the unlikelier fights I picked while blogging was with an MIT group that aimed to wirelessly power devices ...

Fluorescence image of Bose-Einstein-Condensate. Image Credits: Stefan Kuhr and Immanuel Bloch, MPQ String theory is infamously detache...

Noise is the physicists’ biggest enemy. Unless you are a theorist whose pet idea masquerades as noise. Then you are best friends with noise....

I have a headache and blame Nature magazine for it. For about 15 years, I have worked on quantum gravity phenomenology, which means I st...

I’m back from Cambridge, where I attended the conference “Gravity and Black Holes” in honor of Stephen Hawking’s 75th birthday. First t...

Numbers speak. [Img Src ] Once upon a time, we had problems in the foundations of physics. Then we solved them. That was 40 years ago. T...

I’ll be traveling the next two weeks. First to Cambridge to celebrate Stephen Hawking’s 75th birthday ( which was in January ), then in Tri...

“Hi Bee, One of the often repeated phrases here in Italy by so called “science enthusiasts” is that “science is not democratic”, which to ...