Is it possible to travel around the world if you only move north from the South Pole?

The answer to this question is negative. If you start moving from the South Pole and, without changing direction, move only to the north, then you can reach the North Pole. And this is only half of the trip around the world. This is the northernmost point of our planet, from there it is possible to move only to the south. That is, if you continue to go south and again reach the starting point (South Pole), you will get a round-the-world trip. Moreover, the way back must pass along the other side of the planet (along the other meridian).