Arctic has lost more sea ice this year than at any time since satellite records began in 1979, Nasa says. Scientists involved in the calculations say it is part of a fundamental change.

Most sea ice is contained within the polar ice packs in the Arctic and Southern oceans. These ice packs undergo season variations and are also affected locally on smaller time scales by wind ...

With much of it covered in ice all year round and with no daylight from October to March, the Arctic Ocean is one of the world's most remarkable oceans. It's home to a multitude of unique life ...

Arctic sea ice growth was slow in February, leaving extent at record-low levels for the end of the month. In the Antarctic, ...

And what happens in the Arctic trickles down to all of us. "If the sea ice disappears, the Arctic will warm faster and the planet will warm faster," Lehner said. Scientists say to slow the melting ...