The arXiv is the physicsts' marketplace of ideas. In high energy physics and adjacent fields, almost all papers are submitted to the ar...

Greetings from the west-end of my trip, which brought me out to Maui, visiting Garrett at the Pacific Science Institute , PSI. Launched roug...

Tl;dr : A new paper demonstrates that quantum gravity can split light into spectral colors. Gravitational rainbows are almost certainly un...

Astrophysicists dream of putting radio telescopes on the far side of the moon. [Image Credits: 21stcentech.com ] An upcoming generatio...

I am traveling the next three weeks and things will go very slowly on this blog. In case you missed it, you might enjoy two pieces I recen...

From the Great Wall to the Great Collider: China and the Quest to Uncover the Inner Workings of the Universe By Steve Nadis and Shing-Tung...

I wish people would stop insisting they have free will. It’s terribly annoying. Insisting that free will exists is bad science, like insis...

Soft hair. Redshifted. Last year August , Stephen Hawking announced he had been working with Malcom Perry and Andrew Strominger on a solu...

“Final theory” is such a misnomer. The long sought-after unification of Einstein’s General Relativity with quantum mechanics would not be ...

Beyond the Galaxy: How Humanity Looked Beyond Our Milky Way and Discovered the Entire Universe By Ethan Siegel World Scientific Publishi...

A lightsaber works by emitting a stream of magnetic monopoles. Magnetic monopoles are heavy particles that source magnetic fields. They ar...

Seven Brief Lessons on Physics By Carlo Rovelli Allen Lane (September 24, 2015) Carlo Rovelli’s book is a collection of essays about the...

This question was asked by Scientific American , hovering over an article by Davide Castelvecchi. They should have asked Ethan Siegel. Becau...

2015 was the International Year of Light . In May, I came across this video by the Max Planck Society , in which some random people on the s...

Kay zum Felde asked: “Is the multiverse science? How can we test it?” I added “Is the multiverse real” after Google offered it as autocom...

Image credit: Technologistlaboratory . This morning, someone sent me a link to a piece that appeared on WIRED You Can’t Ride a Hoverboa...