Reducere. All things on this Earth are part of the ecosystem. Animals and plants depend on each other to survive. Animals and plants also need the Sun and no...
Reducere. Food, paper, water, fuel--everything we use in our everyday lives started out as a natural resource. Some natural resources are limitless, like the...
Reducere. The Earth beneath our feet feels solid and unmoving. However, Earth's surface is constantly changing and deep beneath the crust is liquid rock. Exa...
Reducere. There is so much to see in the desert! Put on your sunscreen and get ready to go on an adventure to the world's driest, most scorching environments...
Reducere. There's so much to see in the sea--from fabulous fish busy darting between the coral reefs to mysterious creatures that wallow at the bottom. Explo...