"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"--

There are trillions of stars in the universe, but we rely on our sun to provide (or contribute to) most of what we need to survive and thrive: heat, light, plants, animals, wind, and water. Complete with fun, cartoon illustrations, this book give kids plenty of information about our sun in an easy-to-read and digest format. By focusing on the needs of an elephant, Wells makes clear just how important the sun is to life on Earth.

The blue whale is the biggest creature on Earth. But a hollow Mount Everest could hold billions of whales! And though Mount Everest is enormous, it is pretty small compared to the Earth. This book is an innovative exploration of size and proportion.

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!

What would life be like with no clocks and no calendars? How would you know when to get up in the morning? Long, long ago, all people could do was watch the sun and moon and try to figure things out. Eventually, they made simple clocks like sundials.

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...

How do you lift a lion? With a machine that's big and powerful with clanking metal parts? There are machines like that. But, others have only a few moving parts. In fact, some machines are so simple that they don't seem like machines at all-like the wheel, the lever, and the pulley. These machines can make work easy, even if you're trying to lift a lion!

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...

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.

"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"-- Provided by publisher.