An ancient world map from 1597 shows that there was once no ice where Antarctica is today, and instead, a vast wall of extra land. Antarctica was not always fro

An ancient world map from 1597 shows that there was once no ice where Antarctica is today, and instead, a vast wall of extra land. Antarctica was not always frozen and was once possible to cross on foot. [▻](https://video.twimg.com/amplify_video/2088816948658270208/vid/avc1/576x1024/_Yd6PQPvt22xSj…