Robert E Wells
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A pygmy shrew is small - it's among the littlest mammals! A ladybug is even smaller, but it hardly seems tiny when you compare it to a protozoa! And there are many things smaller still-so small that we can see them only with a microscope. Would you believe there are particles that are so tiny that we can't measure their exact size? Explore the huge world of the very small!
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It's hard to imagine-the molecules in the glass of water you just finished might have once been part of a water hole that dinosaurs drank from! In this fascinating new book about the water cycle, readers will find that while it might be hard to imagine, it's true.
The author, Robert E. Wells, explains the complete water cycle and also discusses ocean currents, ocean and lake habitats, and hydroelectricity. He also touches on water pollution and our...
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Bengal tigers are an endangered species, due to many human-caused factors, such as poaching, habitat destruction, and global warming. In Robert Wells' signature style, this book explores these difficult topics in a child-friendly manner with endearing illustrations, and it gives kids ways they can help to save the tigers, too.
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If medals were awarded to animals for living a long time, then a giant tortoise would certainly win one. Some giant tortoises have lived for more than 150 years! Still, there are things on this planet much older than giant tortoises. Some of the giant sequoia trees that grow in California would be more than 3,000 years old. But, the trees aren't that old compared to the Barringer Crater in Arizona-that was made about 49,000 years ago. And, it's almost...
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The moon does so much more than shine at night.
Have you ever wondered how the moon was formed or why it changes shape in the sky? The moon's story began 4.5 billion years ago, but it continues to affect everything we do today, from weather to timekeeping. Award-winning science author Robert E. Wells explains how and why the moon matters in our lives-and for the future of space exploration.
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Take a journey through the heart of the Amazon rain forest to discover why it's so important for life on Earth.
Even though rain forests take up less than 10 percent of Earth's land, they are home to more than half the world's plants and animals. In this adventure, readers climb aboard a river boat and tour the Amazon with a local guide. Observe howler monkeys, harpy eagles, and other wildlife as you discover how the planet's largest tropical rain...
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Dive into our oceans to learn why we need them-and why they need us.
Our five oceans cover about 71 percent of the earth's surface and hold about 97 percent of our water. A central part of the planet's water cycle, oceans are essential to all living things. They are home to thousands of species, and they provide humans with food and medicine. Oceans are one of the world's most valuable natural resources, and we must take care of them.
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A tiny difference in your DNA makes you one of a kind.
Inside every cell in the human body are tiny molecules that define all of a person's biological traits. Award-winning science author Robert E. Wells explores DNA with curiosity and awe, pairing thrilling facts with clear explanations. Our human DNA might be 99% the same, but that last 1% difference makes each person unique.