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Our planet Earth is filled with breathtaking wonders . . . from the vast oceans and mighty mountains to the babbling brooks and smallest grains of sand, from the largest whales and swiftest birds to the tiniest microbes and slowest slugs. Countless living and nonliving things abound to amaze us.

The complete World of Nature collection consists of over 300 articles in 18 sections. Some, such as the Birds and Mammals sections, cover biological species. Others deal with more general themes. Ecological Specialties, for example, teaches about ecosystems and keystone species that support them. For coverage of geological features past and present, the place to go is Geological Formations, Flows, and History. And Seasonal Features discusses topics like migration and hibernation.

For articles on drastic natural phenomena such as earthquakes, volcano eruptions, and thunderstorms, we present Nature's Fury. Stories on noteworthy and unusual subjects, such as camouflage in nature, toxic birds, and carnivorous plants, are found under Special Topics.

Here, for AOL@SCHOOL users, we present four articles that come to mind as we enter the spring season.

Corresponding Teachers Guide
and Crossword Puzzle

	Fascination of Fronds This article takes a look at ferns. What? How plain, you say? Think again. Worldwide some 12,000 species range in height from less than an inch to 80 feet. Most grow in the tropics, but some grow in the tundra, or near deserts, or in water.
	Liquid From the Gods The amount and type of vegetation peculiar to an area depends a lot on the amount of rainfall. Hawaii’s Mount Waialeale has the highest average annual rainfall, 460 inches, while northern Chile holds the record for the lowest: 0.03 inch!
	Rites of Spring Most migrants move north once food is available. The robin appears when earthworms become active, but hummingbirds must await the opening of the flowers from which they feed. Warblers wait even longer, till the explosion of insects provides an adequate food supply.
	Our Alien Landscape Many “exotics” have been imported to America: pheasants from China, the European hare and wild boar from the Mediterranean, showy herbs, shrubs, and trees from every continent. Though some upset the local balance of nature, others bring a new richness and variety to this land celebrated as the melting pot.