Tom Murphy

Tom Murphy is a professor emeritus of the departments of Physics and Astronomy & Astrophysics at the University of California, San Diego. An amateur astronomer in high school, physics major at Georgia Tech, and PhD student in physics at Caltech, Murphy spent decades reveling in the study of astrophysics. For most of his 20 year career as a professor, he led a project to test General Relativity by bouncing laser pulses off of the reflectors left on the Moon by the Apollo astronauts, achieving one-millimeter range precision. He is also co-inventor of an aircraft detector used by the world’s largest telescopes to avoid accidental illumination of aircraft by laser beams.

Murphy’s keen interest in energy topics began with his teaching a course on energy and the environment for non-science majors at UCSD. Motivated by the unprecedented challenges we face, he applied his instrumentation skills to exploring alternative energy and associated measurement schemes. Following his natural instincts to educate, Murphy is eager to get people thinking about the quantitatively convincing case that our pursuit of an ever-bigger scale of life faces gigantic challenges and carries significant risks.

Both Murphy and the Do the Math blog changed a lot after about 2018.  Reflections on this change can be found in Confessions of a Disillusioned Scientist.

Note from Tom: To learn more about my personal perspective and whether you should dismiss some of my views as alarmist, read my Chicken Little page.

Food makes babies

Food Makes Babies

It seems to me we got swept up in the currents, now imperiling the world. Along the way, a lot of food made a lot of babies—packing the stadium for the great spectacle of collapse under the weight of the assembled crowd.

June 11, 2025

Ammonite

The Story of B

We must forget The Great Forgetting, which told us that our culture was all of humanity.

June 4, 2025

the ninth wave paiting

Scramble and Cling

Modernity barricades us in a bristling fortress set against the wildness outside. From this position of retreat, having disengaged from the external reality for generation upon generation, we tell spooky stories about what’s out there and shudder to think about the certain death of leaving our safe haven…

May 28, 2025

newt

Eye of Newt

I’m not saying you can wave a wand, click your heels three times, wink and nod, or any such quick remedy to pop yourself out of modernity. It may take generations, and I’m plenty guilty myself. But it’s time to start considering other ways of being—through the eyes of a newt.

May 21, 2025

Titanic sinking by Stower

Off the Marx–Hitler Spectrum

I’m more concerned with the course and speed of the Titanic (or why there even is a Titanic) than with the proper arrangement of deck chairs. As in Ishmael Chapter 12, my chief aim is not fairness and equity within the prison, but in dismantling the prison altogether—arguing that we oughtn’t be on the Titanic in the first place.

May 14, 2025

With Gorilla Gone Will There Be Hope For Man?

Ishmael: Chapter 13

Modernity’s inevitable failure need not be humanity’s ultimate failure. Modernity never could have worked in the long term, and represents only a small sliver of human existence.

May 8, 2025

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