or log in
Karst formations include dolines and dripstones.
Is the tundra region as cold and deserted as many people think?
Above a certain altitude snow does not melt, not even in summer.
In mountainous areas the climate, soil properties, the flora and fauna change...
Mercury, Venus, Earth and Mars may have they formed in much the same way, but only the Earth is...
Rivers play an important role in shaping the Earth's surface: they cause erosion as...
The boundaries of tectonic plates can be seen on the seafloor.
The decisive factor that determines the climate zones of mountains is the altitude above sea level.