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Some cities are built underground. They might be hidden just beneath our feet. Discover where these cities are hiding and what other secrets they...
What do astronauts eat? How do they sleep? Young readers learn about common problems in space and the ways that humans have solved them in the...
Some are bigger than a school bus. Others are as small as a candy sprinkle. Some make people itch. What are they? Plant leaves! Find out why leaves...
Plant roots are amazing! From keeping plants anchored in the ground to sucking up water from the soil, roots are an essential part of plants. Some...
Soil hides most of the time, but it's important. Dig into the layers of soil and learn how it is made. Find out how soil helps plants and other...
Flowers are more than just decoration. They have an important job. But they can't always do it alone. Find out more about the work of flowers, how...
Do you see problems in your school or community that you want to help solve? Learn about the different types of public offices you can run for, and...
The book, Animals Have Classes Too!: Arthropods, introduces young readers to animal classifications by explaining how arthropods are grouped....