Popular Science


Collection of my brief articles on popular science. Most have also been published in Spanish.
Full list at: https://manuelalfonseca.acta.es/docs/papersd.htm.

Manuel Alfonseca

Thursday, June 25, 2026

Paradoxes of Time Travel

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In several previous posts, I have discussed various paradoxes that time travel could cause if it were possible. Travels to the future contr...
Thursday, June 18, 2026

Units of Length

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It was natural for humans to use their own dimensions as a basis to measure distances. Thus arose the inch , the width of a thumb; the span ...
Thursday, June 11, 2026

A new Goldilocks zone

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We are familiar with the Goldilocks zone , considered necessary for the emergence of life in a planetary system. It is the region where the ...
Thursday, June 4, 2026

The Death of Words

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C.S. Lewis In an article published on September 22, 1944, in The Spectator with the same title as this post, later included in the collect...
Thursday, May 28, 2026

About the Encyclical Magnifica Humanitas. Can it be called Luddism?

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The publication of Pope Leo XIV's Encyclical Magnifica Humanitas has prompted some people to accuse it of being an exercise in Luddism ...
Thursday, May 21, 2026

Craig Venter, rest in peace.

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Craig Venter Craig Venter died on April 29, less than six months shy of his 80th birthday. This biologist revolutionized genomics resea...
Thursday, May 14, 2026

The future of science

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Friedrich Nietzsche With the loss of the impetus of Christianity, cyclical conceptions of history have resurfaced in the West. Let us se...
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Manuel Alfonseca
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