A huge underwater volcanic eruption off the Japanese island of Okinawa has left a build-up of pumice stone along the coast.
Swimming Through Pumice Stone After Underwater Volcanic Eruption | BBC News
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Production engineer and certified swim coach. Full-time IT consultant, spare-time swimming aficionado. 2 sons, 2 daughters and a wife. President of the Faroe Islands Aquatics Federation. Likes to run :-)
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