La vida secreta de las serpientes

Mars is perhaps the most thrilling planet these days. With rovers exploring its surface and manned missions in the works, people are wondering if Mars is our next home! In this highinterest book, readers will learn more about Earth's neighbor, including what its climate and surface are like, why it's called the Red Planet, and about the recent discovery of water on its surface. They'll learn all this while solving "Your Mission" math problems that complement and support the text. This motivating volume is an engaging way to explore key aspects of science and math curricula.

Discusses the difference between secrets that are fun to keep and those that make people unhappy, and encourages youngsters to confide in their parents or another trusted adult such painful matters as bullying or improper touching.

Aprenderás a querer y honrar a la Virgen descubriendo las principales devociones y oraciones marianas; con anécdotas, historias, poesías y canciones en las que nuestra Madre es la protagonista.

Más de 15.000 especies de plantas y animales están en peligro de extinción. Este atlas enciclopédico muestra las razones de esta desaparición y presenta algunas de las medidas que están tomando diversas organizaciones para evitarlo.