George Washington Carver
As a child, he was called the "plant doctor." As an adult, George Washington Car...
Water is essential to life. Each human being needs at least thirteen gallons of water every day. We need it to drink, to cook, and to bathe. We need it for growing food, for producing electricity, and for sanitation. Most people in the United States have easy access to water. That is not true for many people in the world. More than one billion people cannot easily get clean water to drink. Some people have to buy their water. They must walk long distances and carry heavy jugs. This water is often expensive. Other people put cisterns, or large buckets, on their roofs to collect rainwater. This rainwater, as well as the water in lakes, rivers, and the polar ice caps, has been around for millions of years.
As a child, he was called the "plant doctor." As an adult, George Washington Car...
Money may not grow on trees, but chocolate does. The cacao tree is found in tropical clima...
Long before the invention of modern scuba equipment, people used something called a diving...