El sueño de Otto

Many animals live in water, but only some can be defined as fish. Twenty-eight thousand species of fish exist, each with different characteristics. Readers from grades one through four will learn that fish have a distinct impact on their ecosystem and will see how fish survive when well-adapted to an uncompromised environment. Beautiful photographs demonstrate the great diversity of fish and accompany intellectually stimulating explanations of their varying roles and traits. From page to page, what a fish is unfolds in vocabulary call-outs, insightful questions, and relatable...

Why do some things heat up quickly while others don't? How can heat cause matter to change form from solid to liquid to gas and back again? Heat cannot be seen, but it can easily be felt. Looking at different objects' molecular makeup, this book describes the fundamentals of heat and furthers understanding through a series of easy experiments.

Una obra sobre todas las orientaciones sexuales para todas las personas, sin importar su género o sexualidad. • James Dawson ha recibido el premio Queen of Teen 2014. • Este libro es gay es una obra divertida y honesta que llena un hueco en la no ficción homosexual. A veces, a los chicos les gustan otros chicos. A veces, a las chicas les gustan otras chicas. A veces, a las chicas les gustan los chicos y las chicas. A veces, a los chicos les gustan las chicas y los chicos. A veces, a las personas no les gustan ni chicos ni chicas. A veces, un chico querría ser una chica. A veces, una...

Presented in a large-size picture book format, this is the story of the Mars Rover Curiosity. It explains how it was built at the Jet Propulsion Laboratory in California, how it got its name, how it got to Mars, and what its mission hoped to accomplish. A timeline about the history of Mars exploration is provided at the end.