Do you think that lying in the bed, you do not move? Concerning a floor and walls in the bedroom – yes. But you move as a point to circles in daily rotation of the earth. And still you fly around the sun together with the planet. And at night the speed of flight is higher, than in the afternoon, owing to bigger remoteness on the whole diameter.

In day 24 hours – it is known to all since childhood. Meanwhile, the question of duration even of terrestrial day is not so simple as it can seem at first sight, and day is not only on Earth.

According to provisions of the theory of earth's plates accepted now, all layer of a lithosphere is divided by the deep breaks representing active narrow zones. The ability of movement of separate blocks relatively each other in plastic layers of the top cloak with an approximate speed of 2-3 centimeters a year is result of similar division. These blocks are called earth's plates.

Long ago it is known that volumes of our planet - size changeable. And here is how they change and as it is reflected in life of all inhabitants of Earth, knows not everyone.