NASA and the National Snow and Ice Data Center say the Arctic's getting thinner, especially near Greenland.
Experts like Walt Meier call these back-to-back records part of a long-term trend, while Jennifer Francis links it to fossil fuel emissions fueling our climate crisis.
Less ice means less sunlight bounces off Earth, so things heat up even more: some scientists warn the Arctic could have ice-free summers by 2050, in some projections even under optimistic emissions scenarios.