Scientists head for the beach to find out.
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References
Durian D. J., et al. Preprint http://www.arxiv.org/abs/cond-mat/0607061 (2006).
DurianD. J., et al. Preprint"http://www.arxiv.org/abs/cond-mat/0607122":http://www.arxiv.org/abs/cond-mat/0607122 (2006).
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University of Pennsylvania.
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Ball, P. What shape is a pebble?. Nature (2006). https://doi.org/10.1038/news060710-15
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DOI: https://doi.org/10.1038/news060710-15