by Roberto and Elio — Ever won­der what do the crea­tures liv­ing in ma­ri­ne sed­i­ment use as food sources? It turns out that much of the food in such sed­i­ments comes from the crea­tures that lived in the wa­ter col­umn, but then died and their re­mains sank to the bot­tom. The sink­ing ca­dav­ers may be as big as those of whales or as small as...