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.

bus driver on Mars

Bus Driver on Mars

To live outside of one’s ecological context—and in fact where no ecology of any relevance exists—would require somehow creating a suitable ecology, or borrowing a sufficiently-complete subset of an existing one that can tolerate a completely novel setting for which the beings are not adapted.

February 25, 2026

medieval Bible

Ditching Dualist Language

The point is not to advocate a sudden new language, but to become more aware of the dualistic impositions deeply woven and perpetuated into modern life, through language. The point is to recognize the prison bars and the constant brainwashing rhetoric issuing from the speakers in the asylum of modernity… and to dislike the situation.

February 18, 2026

Neanderthal

On A Lark

What I want to do in this post, just for fun (well, more than that), is use the rules of this game to show how hard it is to make a strong and clear case for a point that would still be tough to make if I could use all words. I think/hope we can learn from it.

February 11, 2026

Tower of Babel

Babylonian Banter

The most impressive thing we’ve ever designed—or even the collection of all such things—is absolute child’s play next to Life in evolved, ecological relationship. Humility serves us well.

February 4, 2026

Yungas highway

Ditching Dualism #10: Determinism

One major hangup in subscribing to a physics-based universe of material monism is that it appears to remove human agency as typically conceived in our culture. If atoms and their interactions are making everything happen, abiding by rules they (or we) cannot violate, is there any room left for human intervention or free will?

January 28, 2026

ominous clouds

Ditching Dualism #9: Reductionism

The thinking is that claiming Life to be “nothing but” matter is not only a staggering simplification, but also reduces the amazingness of life to mere “dead” physics.

January 21, 2026

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