Topsoil comes in many different forms, from nutrient-rich dirt to desert sand.
Are rocks magically appearing in your garden? Find out where they're coming from on this Moment of Science.
Mudslides may seem like total muddy chaos, but what is the cause?
If you've ever had to dig a hole and then fill it back in, you may have noticed a mysterious thing: there was always a little dirt left over. Why?
Toddlers and slightly older children are prone to chew on things that make adults react with alarm. However, for many children between the ages of two and three, compulsively eating non-food items is an eating disorder known as pica. Learn more on this Moment of Science.
Do hand sanitizers work any better than soap and water? Find out on this Moment of Science.
How do biologist find DNA from organism that lived thousands of years ago? Find out on this Moment of Science: "DNA Dirt".
By the time the average passenger car tire ends up at the scrap yard, it weighs six pounds less than when it was new. Multiply six pounds by the number of tires scrapped each year in the U.S., and we’re talking over three-quarters of million tons of rubber that perform a disappearing act every year!
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.
By trapping all sorts of dirt and debris, the waxy stuff your ear produces helps keep the ear clean. Q-tips are commonly used to clean the wax from your ear when it gets to be too abundant.