Topsoil comes in many different forms, from nutrient-rich dirt to desert sand.
Crabgrass, the killer weed, inflicts chemical warfare on lawns and farms.
In the spring, the eastern half of North America turns into one big spittoon for spittlebugs.
Are rocks magically appearing in your garden? Find out where they're coming from on this Moment of Science.
Rain forests are full of abundant vegetation and life. So, why does the soil change when the trees are cut down?
Why do we send worms into space? Find out on this Moment of Science.
Earthworms swallow soil, extract nutrients from it, then excrete the rest up onto the surface.
Learn about the many animals that have mastered food caching!
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What's as light as smoke but strong as a brick? Find out on this Moment of Science.