Showing results for "Gold" in Science & Technology

Camina entre los altos pastos y descubrirás por qué los pastizales son uno de los grandes tesoros de la Tierra.

What would you give for a bucket of pee? You might be surprised—pee is full of useful stuff! It’s had a lot of uses throughout history. See how people have used urine for important aspects of life— including cleaning your clothes and brushing your teeth!

Aluminum was once more valuable than gold. A breakthrough in refining aluminum from rock transformed it from rare matter to sandwich wrapper. In this science story, you'll learn how two chemists, Charles Hall and Paul Héroult, solved the problem.

The United States keeps its gold safe at Fort Knox. How is this done? There are fences, locks, guards, and more. Learn more about this high-security place!

Is planet Earth flat? Is California an island? Can you mix other metals to make gold? At one time science supported wild notions like these! But later studies proved these ideas were nonsense. Discover science's biggest mistakes and oddest assumptions about geology and ecology, and see how scientific thought changed over time.

From Buffy Silverman, author of On a Snow-Melting Day, comes an exciting companion book. As autumn begins, plants and animals in nature begin to change in all kinds of ways to prepare for winter. Rhyming text works in this engaging read-aloud to highlight these changes, and back matter offers more information about each creature and change featured.