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"For almost four billion years, microbes had the primordial oceans all to themselves. The stewards of Earth, these organisms transformed the chemistry of our planet to make it habitable for plants, animals, and us. Life's Engines takes readers deep into the microscopic world to explore how these marvelous creatures made life on Earth possible--and how human life today would cease to exist without them. Paul Falkowski looks "under the hood" of microbes...

"...an informative and entertaining look at the good and the bad (and possibly a few ugly) microscopic organisms that live in you and on you."--Page [4] of cover.

"Learn all about the history of antibiotics, from how they were first invented to how they impact our lives today."-- Provided by publisher.

The book explains what germs are, how bacteria and viruses affect the human body, and how the body fights against them. Other segments include: Finding out about germs: LeVar uses a microscope to discover what germs really look like ; How your body fights germs: animation featuring the body's defense team works in action ; How bacteria can help: a visit to an organic farm illustrates how micro-organisms are important to growing food.

This lesson describes how the growth and reproduction of bacteria and the replication of viruses can affect human health. Students will learn how the body's natural defenses can be enhanced by immunization and medications.

Contains four episodes that follow Ms. Frizzle and her class on their science adventures aboard the magic school bus where they go inside the human body.