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Summary
Though most of them are too small to be seen with the naked eye, bacteria are everywhere. They appeared on Earth more than 3 billion years before the first dinosaurs. Some bacteria cause deadly diseases, but many of them are helpful to us. They fertilize the soil by breaking down dead material, and they are an essential ingredient in many foods. Bacteria in our own bodies are a vital part of the digestive process.--from page 2 of cover.
Author
Summary
"Besides being gross, what is the point of boogers and mucus? Read all about how these slimy substances help us digest our food and prevent us from becoming sick. You'll also find out just what this sticky stuff is made of, why we produce more of it when we've got a cold, and what animals like slugs and snail do with their mucus!, "--back cover.
Author
Summary
"Nasty stinging creatures that destroy crops and spread disease - if that's your opinion of insects, read this fascinating book to discover the other side of the story. Without insects to pollinate flowers, we would have no fruit. Without bees, we would have no honey. Maggots are not pretty, but they help to make the world a cleaner and healthier place."--Provided by publisher.
Author
Summary
"Sticking sharp needles into small children doesn't sound like a nice thing to do--but sometimes you have to "be cruel to be kind." Since the 18th century, vaccinations have saved millions of people from deadly diseases. In the future, as new techniques are invented, we might even be able to give vaccines without that needle."--Provided by publisher.
Author
Summary
"It's a nuisance when it rains on a picnic. It's a tragedy when a tornado destroys a neighbourhood. But our planet would be a very different place if it didn't have extremes of weather. Weather has shaped the world we live in, and humans have learned to live in almost every climate that can be found on Earth."--Provided by publisher.