Category: Science

Because 4% of the Energy Controls 100% of the Photons

“I work around the clock– 1043 Planck times per second– providing the gravitational attraction to hold this galaxy cluster together. And some baryonic cosmologist wants to explain me away as a modification of Newtonian gravity? “I have been silent for 13.7 billion years, but no more. “I AM THE 96%” (Original Pandora Cluster image from… Continue reading Because 4% of the Energy Controls 100% of the Photons

Strongly Correlated Physics in a Superposition State

It’s been a while since I posted anything science-y, and I’ve got some time between flipping pancakes, so here’s an odd thing from the last few weeks of science news. Last week, there was an article in Nature about the wonders of string theory applied to condensed matter physics. This uses the “AdS/CFT” relationship, by… Continue reading Strongly Correlated Physics in a Superposition State

Experimentalists Aren’t Idiots: The Neutrino Saga Continues

In a lot of ways, the OPERA fast-neutrino business has been less a story about science than a story about the perils of the new media landscape. We went through another stage of this a day or two ago, with all sorts of people Twittering, resharing, and repeating in other ways a story that the… Continue reading Experimentalists Aren’t Idiots: The Neutrino Saga Continues

Active Learning Experiment: The Halfway Point

Tuesday was the last day of the fifth week of classes (out of ten; for reasons that passeth all understanding, we started on Wednesday, so all the week-based deadlines fall on Tuesday). Accordingly, it seems like a decent time for an update on the active learning stuff I’ve been doing in my classes. Each class… Continue reading Active Learning Experiment: The Halfway Point

Shameless (if Belated) Self-Promotion: Me on the Radio

If you want to know how stressed and busy I’ve been lately, you don’t have to look any farther than the fact that I’ve totally fallen down on the shameless self-promotion front: I was on a radio show, and forgot to post about it here. I know, bad blogger, no pageviews… Anyway, I talked about… Continue reading Shameless (if Belated) Self-Promotion: Me on the Radio

Congratulations to Perlmutter, Schmidt and Riess, and also Evan and Cusp

The 2011 Nobel Prize in Physics goes to Saul Perlmutter, Brian P. Schmidt and Adam G. Riess “for the discovery of the accelerating expansion of the Universe through observations of distant supernovae.” Ethan will presumably have a post with about a gigabyte worth of images in it shortly, or if you prefer your information in… Continue reading Congratulations to Perlmutter, Schmidt and Riess, and also Evan and Cusp

Faster Than a Speeding Photon: “Measurement of the neutrino velocity with the OPERA detector in the CNGS beam”

There have been a lot of pixels spilled over this faster-than-light neutrino business, so it might not seem like something I should take time away from pressing work to write up. It is the story of the moment, though, and too much of the commentary I’ve seen has been of the form “I am a… Continue reading Faster Than a Speeding Photon: “Measurement of the neutrino velocity with the OPERA detector in the CNGS beam”

Neutrino Hypotheses Non Fingo

The final sentence of the neutrino paper that everybody is buzzing about: We deliberately do not attempt any theoretical or phenomenological interpretation of the results. From a somewhat older work in physics: Rationem vero harum gravitatis proprietatum ex phænomenis nondum potui deducere, et hypotheses non fingo. Quicquid enim ex phænomenis non deducitur, hypothesis vocanda est;… Continue reading Neutrino Hypotheses Non Fingo

How to Teach Relativity to Your Dog: The Cover

I’m looking at an email from my editor when Emmy wanders by the computer, sniffing around just in case a crumb of food has fallen on the floor in the last five minutes. “Hey,” I say, “Come here and look at this.” “Look at what?” “This:” “It’s the cover for my new book.” “A-hem.” “OK,… Continue reading How to Teach Relativity to Your Dog: The Cover