In 1944, reindeer were introduced to an optimal habitat on st. matthew island in the bering sea. the population grew exponentially until the winter of 1963-64, when the population dropped dramatically. the reindeer population dropped because they exceeded their\

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.