evidence: Winter 2023's Antarctic sea ice was at its lowest level since satellite measurements began. A new study shows how unlikely this would be without man-made factors. For decades, scientists have gathered evidence that climate change is melting sea ice in the Arctic. But Antarctica has been this weird outlier. The region's sea ice melt hasn't been so dramatic. That's because the two places are quite literally polar opposites. The Arctic up north is an ocean surrounded by land. The Antarctic in the South is land surrounded by ocean. [...] FADEL: Antarctic sea ice plummeted to the lowest point on record, but it wasn't immediately clear whether human activity caused that. There's a lot going on in the Antarctic climate, Holmes says.