Here’s a link to Krzysztof Zawierucha’s (Adam Mickiewicz University, Poznan) new film about the biology of ice and snow, including cryoconite holes, snow and ice surfaces. The film clearly shows why Earth’s ice and snow represents a threatened store of biodiversity and illustrates some of the feedbacks between physical and biological processes operating in the cryosphere. See also Krzysztof’s paper in Journal of Zoology for more information about what can live in cryoconite holes specifically (and for more information on cryoconite holes, our cryoconite review).