Alpine tundra
Alexander von Humboldt was one of the first scientists to write about alpine places.  He was from Germany.  In the 1800s, he went to South America and climbed the Andes mountains.  He wrote papers and drew drawings about the mountains and their plants and animals.  In 1889, another scientist, C. Hart Merriam, wrote about "life zones" that he saw in mountains in Arizona.  He put plants, animals, and places in groups and saw that, the further south he looked, the higher up the place had to be to have the same kinds of plants and animals.  His ideas work well in North American mountains, but they do not work well in tropical places.