NASA satellites recorded Arctic sea ice at 1.78 million sq miles on Sept. 10, 2025—its tenth-lowest extent. Antarctic ice also stayed below seasonal averages. Scientists stress these lows reflect long-term climate-driven changes reshaping Earth’s polar regions.NASA satellites recorded Arctic sea ice at 1.78 million sq miles on Sept. 10, 2025—its tenth-lowest extent. Antarctic ice also stayed below seasonal averages. Scientists stress these lows reflect long-term climate-driven changes reshaping Earth’s polar regions.