Caves, stalactites, stalagmites

In some cells flowing underground rivers or streams. There are underground cavities, where preserved lakes, pools of different sizes with standing water at the bottom of some caves. Cameras are very large or very small. In North America there is the famous Mammoth Cave. It consists of two hundred galleries with a total length of at least dvuhsotpyatidesyati kilometers. The largest has a height of thirty meters cave floor is usually littered with fragments of rock or covered with dust. The caves are often found bones of humans and animals that lived here thousands of years ago. Then people could not build houses and hiding from the cold and predators in the caves. Nowadays, the caves inhabited by bats, owls, owl and doves. Primitive man, who lived in caves, twisted remains of their bones and their animals, which he ate, the coals and ashes of their hearth, the remnants of stone and bone axes and knives. On the walls of many caves to this day preserved paintings and inscriptions. At the bottom of the ceiling and many caves you can find solid, petrified forms. They are composed of lime and precipitated from water that seeps through cracks in the ceiling. So little by little from the ceiling grows long icicles, called stalactites. From the floor, at the same time, growing another icicle, more broad and flat - a stalagmite. If the ceiling a lot of cracks, then it eventually grows a lot of stalactites. If you do not break off stalactites and stalagmites - they are in time, connecting with each other, form a solid brilliant column. These droplets on the vault and on the cave floor create a very beautiful and spectacular in artificial light architectural ensembles. Even more beautiful lighting effects in the caves - the glaciers, as stalactites and stalagmites in them are composed of ice. At low temperatures, they grow not only in winter, but in the summer. The walls and vaults, where the water does not drip, water vapor is deposited as frost, consisting of large beautiful ice crystals. These crystals reflect light candles or torches millions of sparkles.