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.

tarsier

The Genius of Survival

Pull Einstein out of his artificial context and plop him (with colleagues, sure) into a wild place and you’ll quickly find out who the real geniuses are. Humans are certainly capable of such genius survival, but only if loaded with the appropriate cultural software—as vanishingly few are today. Not genius.

August 20, 2025

leaf blowers

The Worst Inventions

The real question is whether all future modes of human living are fundamentally incompatible with ecological sustainability, and I very much doubt we can make such a strongly definitive statement.

August 13, 2025

bookcover

My Ishmael

We’re awkwardly caught between being too intelligent to work as well as turtles and mushrooms, but not intelligent enough to be like angels or gods. The flaw, then, is intelligence, which gives us enough power to screw up the world. It’s a special curse. Yet, we need not invoke interstellar travel to find people who have lived sustainably and without difficulty.

August 6, 2025

Grim reaper

Death as a Nothing-Burger

Fear of death pervades our culture: many among us cringe at its mention, and indeed structure whole lives around elaborate stories of denial: we can’t really ever be dead, surely!

July 31, 2025

Threatened hedgehog

What is Life?

So, what is Life? To me, it’s a staggeringly impressive trick that the universe can perform, playing by the normal rules utilizing the normal material. Wow. Lucky us!

July 23, 2025

rivulets

Rivulets of Life

I am not claiming that we need to consider rivulets or fire or lightning as animate forms of Life. The difference in complexity is truly staggering. Yet, the comparison offers a mottled window—especially into decision-making processes that appear (via feedback/success) to be directed, or purposeful.

July 16, 2025

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