| 1 | The problem, though, is that the Earth's tilt on its axis has shifted significantly since then. | |
| 2 | If the earth' s axis did not tilt, there would be no seasonal change on it. | |
| 3 | Earlier great earthquakes also changed the axis and shortened the day. | |
| 4 | The earth spins around on its axis as it travels around the sun. | |
| 5 | Perhaps more impressive is how much the quake shifted Earth's axis. |