WATCH: Arctic's thickest ice breaks for the first time
The Arctic's strongest, thickest and oldest ice is breaking apart. This has happened twice this year - and never before in recorded history.
Scientists say "the last ice area" has experienced strong winds and temperature spikes, which have been powerful enough to break the ice.
The ice in the area is four metres thick and doesn't easily get shifted, according to Walt Meier, a senior research scientist at the US National Snow and Ice Data Center, quoted in The Guardian.