Changes

'''Tundra''' are the treeless plains of the arctic circle.  The soil is a thin coating over permafrost.  For most of the year the temperature never gets above freezing, and even during the short summer doesn't rise above 50 degrees (F).

'''Tundra''' are the treeless plains of the [[arctic]] circle.  The soil is a thin coating over permafrost.  For most of the year the temperature never gets above freezing, and even during the short [[summer]] doesn't rise above 50 degrees Fahrenheit (or 10 degrees Celsius).

Typical tundra vegetation includes [[lichens]], [[mosses]], and stunted [[shrubs]].

Typical tundra vegetation includes [[lichens]], [[mosses]], and stunted [[shrubs]].