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- The Science of Interstellar
- How to Communicate on the Internet
- Does Santa Exist?
- The Evolution of Evolution: Gradualism, or Punctuated Equilibrium?
- Ten Questions for the Philosophy of Cosmology
- Planck Speaks: Bad News for Primordial Gravitational Waves?
- How Much Cosmic Inflation Probably Occurred?
- Cosmological Attractors
- John Barrett: The irony of it all will be that they changed the physics of what a black...
- Gary Godfrey: “Interstellar” needs the speculative notion of a wormhole kept open with...
- Ray Gunn: Hi Sean. I saw your cameo last night on the the network once known as The...
- Ray Gunn: Shmi Nux, Good point on my previous comment! I’ll probably be wrong,...
- Navneeth: The comments section of this post ought to get the award for the...
- Shmi Nux: Ray Gunn, A wormhole made with exotic matter can have arbitrarily low mass or...
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Category Archives: Science
In some ways I’m glad I’m not an evolutionary biologist, even though the subject matter is undoubtedly fascinating and fundamental. Here in the US, especially, it’s practically impossible to have a level-headed discussion about the nature of evolutionary theory. Biologists … Continue reading
Last week I spent an enjoyable few days in Tenerife, one of the Canary Islands, for a conference on the Philosophy of Cosmology. The slides for all the talks are now online; videos aren’t up yet, but I understand they … Continue reading
Ever since we all heard the exciting news that the BICEP2 experiment had detected “B-mode” polarization in the cosmic microwave background — just the kind we would expect to be produced by cosmic inflation at a high energy scale — … Continue reading
Nothing focuses the mind like a hanging, and nothing focuses the science like an unexpected experimental result. The BICEP2 claimed discovery of gravitational waves in the cosmic microwave background — although we still don’t know whether it will hold up … Continue reading
I want to tell you about a paper I recently wrote with grad student Grant Remmen, about how much inflation we should expect to have occurred in the early universe. But that paper leans heavily on an earlier one that … Continue reading
Faithful readers are well aware of the importance of effective field theory in modern physics. EFT provides, in a nutshell, the best way we have to think about the fundamental dynamics of the universe, from the physics underlying everyday life … Continue reading
This is amazing. (Via Bob McNees and Michael Nielsen on Twitter.) Backstory for the puzzled: here is a nice paper that came out last month, on inflation in supergravity. Inflation in Supergravity with a Single Chiral Superfield Sergei V. Ketov, … Continue reading
Greetings from sunny (for the moment) Yorktown Heights, NY, home of IBM’s Watson Research Center. I’m behind on respectable blogging (although it’s been nice to see some substantive conversation on the last couple of comment threads), and I’m at a … Continue reading
Hidden in my papers with Chip Sebens on Everettian quantum mechanics is a simple solution to a fun philosophical problem with potential implications for cosmology: the quantum version of the Sleeping Beauty Problem. It’s a classic example of self-locating uncertainty: … Continue reading
One of the most profound and mysterious principles in all of physics is the Born Rule, named after Max Born. In quantum mechanics, particles don’t have classical properties like “position” or “momentum”; rather, there is a wave function that assigns … Continue reading