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Got a fan of snakes, lizards, and turtles? Dig into this beginner's guide to reptiles from Cathryn and John Sill, creators of the award-winning About... series. Author and educator Cathryn Sill explains in simple language the basic characteristics that all reptiles share, while offering a look at many of the animals that fall into this diverse category, including ever-popular lizards, snakes, and turtles. The beautifully detailed paintings of noted wildlife illustrator John Sill depict reptiles in their habitats and highlight their unique aspects. An afterword provides more detail on each...

Examines The Properties Of Matter, The Use Of Energy From Gasoline Or Batteries, And Various Other Sources Of Energy.

Adaptada para jóvenes lectores, esta es la inspiradora biografía de la que fue la primera dama de Estados Unidos, Michelle Obama. Michelle Robinson nació en el lado sur de Chicago. A pesar de sus humildes orígenes, llegaría a ser Michelle Obama, la inspiradora y poderosa primera dama de Estados Unidos. Junto con su marido, Barack Obama, elegido el cuadragésimo cuarto presidente, serían la primera familia negra en la Casa Blanca, y desde allí servirían al país durante dos mandatos. Michelle es ejemplo de que, con perseverancia y esfuerzo, no hay límites; de origen humilde, llegó a...

Who were the earliest Americans? When, how, and from where did they enter and spread across the continent? And what is their relationship to modern Native Americans? Anthropologists develop theories to answer these questions based on the evidence they discover. Their theories—and the discoveries that prove and disprove them—are highlighted in this fascinating volume, full of awe-inspiring facts and incredible breakthroughs. Readers will feel like anthropologists and archaeologists themselves as they read about bones and artifacts, and what they reveal about the ancient cultures that roamed...