A new satellite-based study has shown that Alaska's coastline is eroding more than twice as fast as it used to, due to Earth's warming temperatures. The study, which focused on the retreating permafrost coastline at Drew Point, in Alaska's North Slope region, found that from 1955 to 1979, the rate of loss was only about 23 feet per year, but from 2007 through 2016, it was about 56 feet per year. The study suggests that much of the coastline encircling the Arctic could be undergoing similar, if not quite as rapid, changes. The loss of sea ice, and the resulting increase in waves, has been a threat to a number of Arctic communities, including tiny Kivalina, which is seeking to relocate because waves threaten the barrier island where the community sits.