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Comments to #9
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Dalton 1 day ago
Izi, I hope there will be more!
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Marissa 1 day ago
The sad thing is I'm old enough to actually remember using these things once,.
’’A plastic-like, circular object (3 cm) made of ’cells’ (like those in beehives), distributed around four concentric rings. Found on several beaches in Sardinia, Italy.’’
Answer: "It’s a biofilm used to treat wastewater."