The document summarizes different types of tundra regions around the world. It discusses the arctic tundra found around the North Pole in Russia and Canada, characterized by permafrost, dwarf plants, and animals adapted to harsh winters and short summers. It also describes alpine tundra at high altitudes worldwide, featuring short trees and grasses, and the Antarctic tundra, the coldest, driest place on Earth, with only mosses, lichens, penguins and seals able to survive.