Did you know that your blood is filled with multiple types of toxins? Learn more on this Moment of Science.
Earthworms may be good for your garden, but are they harmful to other habitats? Find out on this Moment of Science: "Attack of the Earthworms".
In the desert, the absence of water means little or no chemical weathering can take place. Instead, erosion, frost, sedimentation, and the huge temperature fluctuations between day and night break down the rocky surface into sand or gravel.