"Relevant images match informative text in this introduction to jaguars. Intended for students in kindergarten through third grade"--Provided by publisher.

Few events attract as much attention, or create as much spectacle, as the Iditarod Trail Sled Dog Race. Each March, despite subzero temperatures and white-out winds, hundreds of dogs and mushers journey to Anchorage, Alaska, to participate in "The Last Great Race on Earth," a grueling, thousand-mile race across the Alaskan wilderness. In Four Thousand Paws, award-winning trail veterinarian Lee Morgan tells the story of the heroic canine athletes who,...

"Physicists will tell you that four forces control the universe. Of these, gravity may the most obvious, but it is also the most mysterious. Newton managed to predict the force of gravity but couldn't explain how it worked at a distance. Einstein picked up on the simple premise that gravity and acceleration are interchangeable to devise his mind-bending general relativity, showing how matter warps space and time. Not only did this explain how gravity...

"Engage your earliest readers with these nonfiction animal introductions! In Hedgehogs, emergent readers learn how hedgehogs live in the forest and use their quills to stay safe. Carefully crafted text, high-frequency words, repetitive sentence patterns, and strong visual references support emergent readers. Hedgehogs includes tools for caregivers as well as introductory nonfiction features such as labels, a table of contents, words to know, index,...

"Relevant images match informative text in this introduction to different desert animals. Intended for students in kindergarten through third grade"--

An examination of how working dogs help with police work, herding, therapy, medical detection, and more.

"A girl named Petra Pena, who wanted nothing more than to be a storyteller, like her abuelita. But Petra's world is ending. Earth has been destroyed by a comet, and only a few hundred scientists and their children - among them Petra and her family - have been chosen to journey to a new planet. They are the ones who must carry on the human race. Hundreds of years later, Petra wakes to this new planet - and the discovery that she is the only person...

An account of the century of experimentation that confirmed Einstein's theory of relativity, bringing to life the science and scientists at the origins of relativity, the development of radio telescopes, the discovery of black holes and quasars, and the still unresolved place of gravity in quantum theory. Albert Einstein did nothing of note on May 29, 1919, yet that is when he became immortal. On that day, astronomer Arthur Eddington and his team...

"This emerging reader title looks at burrowing owls and the very clever way they trick their prey. The title also covers where these animals can be found, what they look like, and what they like to eat"--Provided by publisher.

"Relevant images match informative text in this introduction to different Arctic animals. Intended for students in kindergarten through third grade"--Provided by publisher.