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Juan Manuel García-Ruiz

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Illustrative image: interior of a cave with huge selenite crystals illuminated by warm light, with a tiny figure in the background.

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The Naica Cave: only 10 minutes of life without special gear at 58°C

The Naica Crystal Cave in Mexico imposes lethal conditions: 58°C and 99% humidity. Without cooling gear, a person can only last ten minutes.

Beatriz Lorenzo Aguirre · 28 July 2026