Dramatic sea ice loss caused Pacific walruses to come ashore in record numbers in September. The National Oceanic and Atmospheric Administration (NOAA) spotted an estimated 35,000 walruses on Alaskan beaches during their annual arctic marine mammal aerial survey. AP Photo/NOAA, Corey Accardo
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Slava StepanovJesse AllenWellcome ImagesNASA/Colorado School Of MinesKen Chen, UC Santa CruzUniversity of Massachusetts, AmherstNASA’s Goddard Space Flight Center/S. WiessingerArgonne National LaboratoryDavid Sandwell, Scripps Institution of Oceanography, UC San Diego
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