Walrus shortage may have caused collapse of Norse Greenland

Communities vanished in 15th century after walrus hunted to near extinction, study finds

The mysterious disappearance of Greenland's medieval Norse society in the 15th century came after walruses were hunted almost to extinction, researchers have said.

Norse communities thrived for more than 400 years in the Arctic, hunting walruses for their tusks, a valuable medieval commodity.