Jen Green

How do we know that the Sun is at the center of our solar system? This scientific theory is know as heliocentrism. This fascinating book looks at the historical controversies that surround the theory of heliocentrism and tells the stories of the scientists who worked on the theory. It also examines how the theory of heliocentrism was arrived at, how it was tested, and what impact the theory has had on our understanding of science today.

A sea otter mother licks and licks her newborn's coat to clean it and get out the tangles. The pup's fur is so soft, fluffy, and full of air by the time she finishes that the baby floats easily on the sea's surface. Then the mother looks up at the sky and sees a huge bald eagle diving straight toward her pup! She has only seconds to prevent disaster. Young readers will explore the underwater world of this marine mammal through clear text, full-color...

A few seals are playing in the waves near a shore. Suddenly a dark, triangle-shaped fin appears above the water's surface. When the seals see the fin headed toward them, they scatter in all directions as fast as they can. They know that one of the scariest predators in the sea--a great white shark--is headed their way! Young readers will explore the underwater world of this enormous fish through clear text, full-color photos, and diagrams. Age-appropriate...

Advertising, which aims to influence the thinking and behavior of consumers around the world, is a multibillion-dollar industry. People are exposed to many different forms of advertising every day, including TV and radio commercials, newspaper and magazine ads, posters and billboards, direct mail, and Internet ads. Readers learn how advertising works, including common techniques and approaches, and explore the debate about advertising's effects on...

A California sea lion shoots above the ocean's surface. Suddenly there is another, and then a third one racing through the water. The sea lions are speeding toward one of their favorite places to dive for clams. Then things get scary. A gigantic great white shark bursts out of the water. The sea lions' hunting trip has just turned into a race for their lives! Young readers will explore the underwater world of these beautiful marine mammals through...

Weather is all around us. It affects everything we do, from the way we travel and the houses we live in, to the food we eat and the clothes we choose to wear. My First Fact File: Weather is a first introduction to the fascinating subject of weather for children aged 5 and up. Learn about how the seasons impact on weather around the world. Find out what causes different kinds of weather to happen, from tornadoes and hurricanes to rain and snow....

This book explores the ways in which we are depleting the planet's resources, and the need to use them in a sustainable manner. Can we meet all our needs and wants without destroying our forests and fisheries?

Simple text and pictures illustrate the importance of conserving water.

Journey back in time to the age of the dinosaurs, the biggest, scariest creatures the world has ever known. Which dinosaurs hunted in packs like wolves? What was the deadliest dinosaur of them all? Which were the very largest species? Not all dinosaurs were bloodthirsty meat-eaters, but all were armed and dangerous. You are advised to keep well clear as we tour the world of the dinosaurs, taking a detailed look at all the most amazing species.

Which king liked to bathe while the band played Rule Britannia? Which queen was so fat she needed a hoist to get on the throne? Who was the blood-thirstiest monarch of them all? This is a no-holds-barred account of the British monarchy with the gossip and gore left in, and nothing left out! It leaves no stone unturned in its mission to portray kings and queens as they really were, warts and all.