When the streets are clean and the air has a fresh scent, we have sanitation workers to thank for it. Each one of us will leave over 100,000 pounds of...
When our pets are sick, we rely on veterinarians to make them well. Considering how many of us consider our pets as an important member of the family, it's a...
Out among the planets and moons of our solar system, much smaller chunks of rock and ice orbit the sun. We call them comets and asteroids. Most asteroids orb......
Earth might be the Blue Planet, but it is also the planet we call home. It's our very own corner of the solar system! Earth is unique. It has abundant...
Which planet is the biggest in the solar system? Which planet has the largest moon in the solar system? Which planet has a storm so big it could swallow Earth?...
Many scientists think Mars was once covered with water, just like Earth. Was Mars once home to living creatures as well? Will people one day live on Mars? Sc......
Mercury is the planet closest to the sun, which has made studying this iron planet very difficult. However, scientists have found new ways to do just that. T......
The moon is the closest object to Earth, and the largest object in our night sky. It even affects tides on Earth. For centuries, humans have observed and stu......
This gripping narrative takes readers on a journey to our solar system's most distant planet. Although it is very similar to its twin, icy Uranus, scientists......
Once thought to be a planet itself, distant Pluto is now called a dwarf planet. Tiny, rocky, cold Pluto stands guard at the edge of our solar system. It is...
Because of its ring system, Saturn is often considered one of the most interesting planets in our solar system. But there's much more that is worth knowing a......
Did you know that Uranus is the farthest planet in our solar system that can be seen without a telescope? It's also the only planet that spins on its side!...
Which planet is Earth's closest neighbor in our solar system? It's Venus, the masked planet. Venus is surrounded by harmful gases. Beneath the planet's poiso......
It gives us light. It gives us warmth. It makes life on Earth possible. It's the sun! This bright book takes readers to the center of our solar system for...
Among the most recognizable animals, cheetahs are famous for their incredible speed. Rabbits, antelopes, and birds beware! Special adaptations make cheetahs ......
Giraffes, with their brown and white markings and extremely long necks, are one of the most recognizable animals. Their incredible height helps them reach th......
Hyenas may look somewhat like dogs, but they are much fiercer and more dangerous. They hunt the African grasslands in groups called clans. They eat almost an......
Did you hear that roar? Lions are on the hunt! They prowl the land in search of their next meal. Antelopes, zebras, wildebeests, and other animals are all on......
Meerkats are often pictured standing on their back legs, still and alert. They are constantly on the lookout for animals that may attack their pack, such as ......
Did you know that ostriches have the largest eyes of all land animals? It's true! These record-breaking birds are taller than an adult human and much, much f......