They are extremely cold and windy, with no trees and very little rain. The tundra covers about a fifth of the Earth's surface. There are two types of tundra: alpine and Arctic. Alpine tundras are ...

potentially altering the habitat of the native animals. Today, however, as the permafrost melts and dead plant material decomposes and releases greenhouse gases, the tundra has flipped from a ...

Humans are the only animal that lives in virtually every possible environment, from rainforests to deserts to tundra ...

Satellite images of plants growing around the dens of Arctic foxes add to the evidence that the foxes are “ecosystem engineers” whose activities create habitat for other organisms. Against the ...