Snow Line, the line, usually in mountains, above which there is permanent snow. Below the line, temperatures are sufficiently high during the warmest months to melt the covering of snow. Virtually nowhere is the snow line in a fixed position, for the altitude at which it occurs varies with the depth of the annual snowfall, exposure to the sun, steepness of the slope, and the direction and velocity of the wind. In general, the snow line decreases in elevation from the equatorial regions, where it lies as high as 20,000 feet (6,000 m), to sea level near the poles.
Like the members of an ill-fated rock group, the seven continents struck out on their own hundreds of millions of years ago. But what caused the breakup? And is a reunion tour in the works?
Wishing you could start your own country? There's good news and bad news. The bad news is that it will take a lot of hard work to make this dream come true. But the good news is that there's actually a procedure in place to make it happen.