The Arctic has lost so much ice that now people want to race yachts through it

This year, we’ve seen yet another Arctic milestone — sea ice covering the top of the world reached the lowest maximum extent yet observed in winter, when ice is at its peak. That means that in the last four years, Arctic sea ice has seen a new low both for its seasonal winter peak (in 2015) and for its summer minimum (in 2012).

Daniel Cornwall (CC BY-NC-SA 2.0)