Earth is gradually reduced in volume

Observations scientists have shown that the Earth is gradually reduced in volume. Over the past 50 years, the radius of the earth has decreased by more than 40 meters. Researchers from the Massachusetts Institute of Technology attempted to identify the cause, so reducing the size of the active Earth shara.Provedya number of tests and calculations, the scientists found that the cause of reducing the size of the Earth is the solidification of the liquid core of the planet. The nucleus gradually hardens, thereby causing seal the crust and mantle Zemli.Analogichnaya situation occurred earlier and with Mercury, very similar in structure to the Earth, itself a tiny planet in our solar system. To reduce the amount of Mercury showed the photo on its surface, obtained from the spacecraft. Mercury then also strongly reduced the amount lost in sizes up to polukilometra.Uchenye calm, calling the situation with the downsizing of the Earth, it is quite normal. Sooner or later, every planet has a liquid core, faced with the solidification of the core, and as a consequence, a decrease of its volume.