Earthworms may be good for your garden, but they can be harmful to other habitats.
Did you know that your blood is filled with multiple types of toxins? Learn more on this Moment of Science.
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.