On an Alaskan glacier, little green moss balls roll in herds

Oval balls of moss, nicknamed ‘glacier mice,’ roll across some glaciers. A new study explores the mysteries behind their herd-like motion.

A Two for One Special. Moss balls and zebra mussels, by U.S.Fish&Wildlife Alaska

A Two for One Special. Moss balls and zebra mussels, by U.S.Fish&Wildlife Alaska

Rolling stones gather moss: movement and longevity of moss balls on an Alaskan glacier

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Glacier mice: these herds of moss-balls roam the ice – and we're uncovering their mysteries

Alaska – The (Mostly) True Adventures of Lupe

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Fuzzy Green 'Glacier Mice' Move In Groups And Puzzle Scientists : NPR

F&S Classics: The Old Man and the Mountains