La optimización mecánica en el medio acuático

What’s the difference between a seal and a sea lion? These “second cousins” of the sea look similar, but there are many ways to tell these creatures apart. From ear shape to the noises they make to communicate, seals and sea lions are amazing creatures with both shared features and many truly unique attributes. They both share an ocean habitat, but when readers take a closer look, it’s easy to discover how they each fight off predators, mate, and raise their young in different ways. Captivating full-color photographs help to bring these marvelous mammals to vivid life.

Agosto de 2001. Un profesor argentino llega a una universidad en el sur de los Estados Unidos para dar un curso de literatura en español. Todo parece perfecto y en su primera clase descubre algo prohibido pero irresistible: una de sus alumnas, Jennifer, una chica deslumbrante y ambigua, con la que inicia una serie de encuentros sexuales cada vez más arriesgados, en medio del secreto y el disimulo. Ninguno de los dos sabe que ese breve período juntos cambiará sus vidas para siempre y que un acontecimiento brutal acabará por trastocar su mundo de la manera más inesperada. Intensamente...

Do you know whose face is on the penny? How slavery ended in the United States? What jobs Abraham Lincoln had before he became president?

Nature gives us many useful things. Sunlight, rocks, trees, plants, and sand are resources. This Spanish book introduces students to the concept of natural resources. With images that are easy to identify and clear, simple sentence structures, this science reader simplifies scientific concepts for young students as they improve their reading skills. A fun and easy science experiment and Your Turn! activity provide more in-depth opportunities for additional learning. Nonfiction text features include a glossary and an index. Engage students in learning with this dynamic text!