This book looks at dolphins as wild mammals and discusses the need to preserve their natural environment.

Introduces robots and the science behind these amazing machines, including a historic timeline of robot development, common jobs robots perform in the workplace and at home, and robots of the future.

"All science classrooms discuss animals that hibernate during winter months, but few know about animals that estivate--a prolonged sleep during hot or dry periods. Dual layers of text awaken readers to the reasons estivating animals become dormant--whether it's because warm weather threatens food supply or to avoid increased body temperatures."--