Bertil with slope (IMAGE)

University of Pennsylvania

Bertil with slope

Caption

During COVID-19 lockdowns, co-first author Bertil Trottet (pictured) helped recreate sloped, sandy landscapes in a makeshift home laboratory, using simple materials and controlled lighting to observe how raindrops rebound, roll, and aggregate grains into “sandballs.” (Images: Hugo Ulloa)

Credit

Hugo Ulloa

Usage Restrictions

Contact Hugo Ulloa for permission to redistribute.

License

Original content

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