Intermediate

What do animals do when they're under attack? Some run. Some hide. But did you know that some animals defend themselves from predators by fighting back? The animals in this book defend… Read More →

Desde la Gran Mancha Roja hasta sus famosas lunas, el planeta más grande de nuestro sistema solar, Júpiter, es una verdadera maravilla. ¡Descubre más sobre este gigante de gas y compáralo con Read More →

Un cielo lleno de aire, océanos compuestos por agua y la presencia de vida son algunas de las cosas que diferencian a la Tierra de los demás planetas. Aprende qué otros aspectos hacen que la… Read More →

Después de la Tierra, Marte es el planeta más explorado de nuestro sistema solar. Vehículos exploradores recorren su superficie para encontrar respuestas a las preguntas de los científicos.… Read More →

Embárcate en un viaje para llegar lo más cerca del Sol que nunca hayas estado. Los lectores descubrirán más sobre Mercurio, el planeta más pequeño de nuestro sistema solar, y lo podrán… Read More →

¿Sabías que Neptuno es el planeta más ventoso del sistema solar? Descubre más sobre Neptuno en esta interesante mirada al planeta más alejado del Sol. Accede a un modelo descargable para… Read More →

Aprende sobre la red de anillos vasta y bella de Saturno, y aprecia de qué manera es similar o diferente a los otros planetas. Accede a un modelo descargable para impresora 3D de la NASA a… Read More →

Este planeta frío y gigante puede estar alejado, pero los científicos saben mucho sobre él y se esfuerzan por descubrir aún más. Aprende todo sobre Urano y qué lo hace un planeta tan… Read More →

Observa cómo se compara Venus con todos los planetas cercanos. Datos interesantes e información científica ayudarán a los pequeños lectores a explorar el planeta más caliente de nuestro… Read More →

Ancient China is one of the world’s oldest civilizations. Discover thousands of years of Chinese history, as well as the amazing achievements and daily activities of the people who lived… Read More →

Who built the pyramids? What did ancient Egyptians do for fun? Ancient Egypt thrived for thousands of years as one of the world’s most advanced civilizations. Learn about the daily lives of… Read More →

The ancient Greeks were great warriors, artists, and learners. Discover the polytheistic religion, many forms of art, democratic government, and common warfare of ancient Greece.… Read More →

Ancient India was home to many civilizations, including some of the oldest in history, stretching back thousands of years! Discover the diverse peoples and cultures of this region and their… Read More →

Ancient Rome was once the world’s most powerful empire, and home to tens of millions of people. Read about Rome’s powerful leaders, genius builders, and strong warriors. Learn about their… Read More →

Bionics helps extend and save lives. Bionics is the science of building machines that mimic living things. Researchers and engineers are building better and better technologies to solve… Read More →

Cryobiology is the science of cold. By studying animals in freezing temperatures, scientists learn how to use cold to make surgeries safer and preserve living organs. Cryobiology helps treat Read More →

Drones are helpful robots that can be flown with radio control. Ranging from the size of a quarter to a sixty-foot wingspan, drones have proven useful in lots of unique ways. Discover the… Read More →

A sky full of air, oceans made of water, and the presence of life are some of the things that set Earth apart from other planets. Learn what else makes Earth unique among the planets in our… Read More →

Forensic science is the use of scientific knowledge to solve a crime. All evidence is important to a forensic scientist, from fingerprints and bones to hidden messages and even bugs. Discover Read More →

From the Great Red Spot to its famous moons, the biggest planet in our solar system, Jupiter, is truly a marvel. Find out more about this gas giant and see how it compares to other planets in Read More →

After Earth, Mars is the most explored planet in our solar system. Rovers travel across its surface to find out answers to scientists' questions. What is Mars like? Did it ever have life?… Read More →

Embark on a journey to get closer to the sun than you ever have before. Readers will discover more about Mercury, the smallest planet in our solar system, and see how it compares to the other Read More →

Mesopotamia may have been the world's first civilization. It has a history spanning over six thousand years! Learn about the different people who lived there. Find out what jobs they did, how Read More →