検索キーワード： 生物学

The massive grassy African savanna is filled with the hunting activity of predators and their prey. The stamina of the hyena allows the animal to hunt its prey until it is too tired to fight. The lion’s strength makes its attacks swift and severe. But which animal is the fiercest of the ecosystem? Compare and contrast each animal’s features and skills before you declare the winning predator.

An animal that looks like a turtle munches on some grass. It has scales and a hard shell. But is it a turtle or a tortoise? Turtles and tortoises are similar, but they have some important differences. Find out how their legs, feet, shells, and behaviors can all help you tell these two animal look-alikes apart.

Two beady eyes peek out of the water. Is it a crocodile or an alligator? They may look similar, but these two reptiles have many differences, including where they live and the shape of their snout. Let’s find out what fearsome creature is really lurking below the water and explore their differences.

Flutter, flutter! What did you just see? Was it a butterfly or a moth? Butterflies and moths are similar, but they have some important differences. Find out how their colors, antennae, bodies, and behaviors can all help you tell these two animal look-alikes apart.

Probes can explore the depths of space in ways that would kill human beings. The information they provide can spur countless innovations here on Earth. Learn how probes work and the exciting possibilities that their discoveries may inspire.

Space isn't just the final frontier—it's big business! From exploration to space vacations, learn how private businesses are transforming the future of space travel and exploration.

Gorgeous eyelashes. Flashy feathers. Silky hair. The animals in this book are far from drab and dull.

Hi, there! I'm a sea turtle. I spend most of my days surfing in warm waters, but I started life much smaller! Learn more about my life cycle and how I went from a tiny little egg to a hatchling to an adult.

Why do we yawn? Are left-handed people more creative? Why do we have fingerprints? When it comes to our bodies, there are a whole lot of questions we’re still trying to answer. Get ready to explore the unknown and discover how scientists are working to solve the mysteries of the human body.

Follow the adventures of Max Axiom as he explains the science behind photosynthesis.

Over the last 400 years, telescope technology has come a long way. From dying stars to burping black holes, take a look at the most exciting discoveries in deep space.

The moon is more than a giant rock orbiting Earth—it could become a gateway into deeper space! Find out how NASA and other international and commercial agencies are working together to explore and build on the moon.

NASA's Orion spacecraft is pushing the limits of space travel and exploration like never before. The ultimate goal is a mission to Mars! Learn about the challenges that scientists, engineers, and astronauts must overcome to make this dream a reality.

Did you know that there are animals all around you that you can’t see without a microscope? Sometimes it’s good you can’t see them. As you shed dead skin cells, thousands of dust mites gobble them up. Gross!

The icy cold Arctic is home to both the powerful polar bear and intelligent orca, two mighty predators. But which animal is the fiercest of the ecosystem? Does the polar bear’s patience in stalking its prey and strength in attack put it on top? Or does the orca’s ability to work in a pod give it the edge?

A tree and your pet look nothing alike, but they have one thing in common—they are both made up of cells. Cells are really small. You can see them only with a microscope.

Go for a hike in the woods and you’re sure to see a wide range of plants. Many colorful flowers and fruits seem perfectly harmless. But don’t be fooled by these beautiful plants. Some plants eat bugs, and some are poisonous, deadly enough to sicken or even kill a person!

Buzz! Buzz! Was that a honeybee or wasp zipping past your ear? While both yellow-and-black striped insects can cause a painful sting, they have many differences.

How did life begin? How many species are on our planet? Can we bring extinct species back to life? When it comes to life on our planet, there are a whole lot of questions we’re still trying to answer. Get ready to explore the unknown and discover how scientists are working to solve the mysteries of living things.

Bugs are everywhere! From large beetles to tiny gnats, bugs come in a variety of sizes, colors, and shapes. Find out all about bug types, behaviors, life cycles, and more in this fact-filled book.