Explores the vital role of deserts and forests, discussing how the deserts are expanding and becoming even more dry and arid, that the forests are disappearing, thanks in part to logging by humans, and how people are working hard to make sure they survive properly.
Cells are the building blocks of life. Tissues are a group of similar types of cells that perform similar functions. Organs are combinations of similar tissues. Discover more in Cells.
Body systems are collections of organs and other tissues that fulfill a particular function in the body. Many of the systems overlap or work together. The nervous system works with every other body system in some way. Discover more in Body Systems.
Read about the many ways that creative people are turning the power of the sun, the earth, water, waves, and more into clean energy that can not only save money, but help us all enjoy a bright future.