Sea ice in the Arctic

The warming trend in the Arctic is at least twice as large as the global average in recent decades. The loss of sea ice amplifies the warming trend because the ocean surface absorbs more sun heat than the surface of snow and ice. How does that affect the planet?

Caves and human

Caves are naturally formed voids in rocks of such size that a person can enter them (crawl, squeeze in, but also run or climb up, seeing with difficulty their walls and ceilings in the light of even strong lamps).


Inhabited by the descendants of the Vikings, a volcanic island torn between two retracting continental plates – Laurentian (Canadian) and Eurasian.