Cómo funcionan los ecosistemas

“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 duck-billed dinosaurs face-to-face: Corythosaurus could honk through the top of its head! Gryposaurus had hundreds of grinding teeth! Parasaurolophus could smack enemies with its strong tail! Plus, you'll get to know...

Cuando Arthur Miller escribe y estrena en 1955 Panorama desde el puente es, sin duda, un autor ya consagrado tanto en Estados Unidos como en el resto del mundo. Una vez más, el dramaturgo norteamericano sigue empeñado en mostrarle al hombre contemporáneo quién es y cómo vive, y le invita a reflexionar sobre quién podría ser y cómo podría vivir. Esta obra tiene su origen en una historia que Miller escuchó mientras trabajaba en los astilleros de Brooklyn: un estribador había denunciado a dos hermanos ante las autoridades de Inmigración. El tema de la inmigración es justamente el...

Families can be big or small, but all resemble each other in one aspect: they have a past and a present that, is also part of a broader history, that of a culture or race, or that of the world. The reader will see that family trees are used both by historians and everyday people who trace generations of relatives. Although family trees imply blood relations, the ties of love and friendship are often just as important.

Discusses Things That Rot And Break Down And Things That Don't, How Decomposing Things May Feed Insects Or Animals Or Help The Soil, And Talks About Recycling.