Freeman Dyson is one of the few survivors of the age of giants in physics (he was one of the people who developed the mathematical underpinnings for Feynman's work), and he remains a fascinating, wide-ranging thinker, the author of works like Infinite in All Directions. Of late he seems interested in being an environmental heretic, but in a much more moderate, intelligent way than the usual "conservative" style. Most recently he's published a long, thoughtful article on the Galpagos islands, with emphasis on the difficulties of balancing the needs of locals against environmental preservation.
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