Mongabay: A mass of thousands of walruses were spotted hauled up on land in northwest Alaska during NOAA aerial surveys earlier this week. An estimated 35,000 occupied a single beach a record number illustrating a trend in an unnatural behavior scientists say is due to global warming. Walruses (Odobenus rosmarus)iconic arctic mammals that are only distantly related to sealstraditionally use sea ice to rest, breed, and give birth, and as a vantage from which to spot mollusks and other food sources. However,...