The Atlantic Ocean is invading the Arctic — and winning

Barents Sea coastline in Finland.
Stretch of Barents Sea coastline in Lapland, Norway. Photo: DeAgostini/Getty Images

The Arctic Ocean's boundaries are getting fuzzier as Atlantic waters push further northward and sea ice thins and melts more with each passing year, a new study finds.

Why it matters: If this trend continues, it could have wide-ranging impacts on lucrative marine fisheries, and may already be altering the weather patterns affecting your daily life in ways researchers are only now discovering.