Sombras chinescas y máscaras

Simple text and photographs introduce the animals of the Arctic, grouped to provide practice in solving easy addition problems.

"Dino" Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children's books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these sea giants face-to-face: The Archelon was similar to a turtle, but its shell was made of crossed rib bone covered in rubbery skin! The Mososaurs had huge pointy jaws and grew to be fifty feet long! The Ichthyosaurs looked a lot...

Learn about the rich history of Mission San Francisco de Asís: how it started, the people who ran it, the indigenous population, and its legacy today.

En el Ártico, cada vez se derrite más hielo en verano. Esto es un gran problema para los osos polares, que necesitan el hielo para sobrevivir, y también es un gran problema para todo el mundo, por que todo nuestro planeta necesita el hielo del Ártica para