En la soledad, el abismo

La cultura medieval islámica ha dado figuras espléndidas. Omar Jayyam, poeta y filósofo, algebrista y astrónomo, es sin duda la más fascinante de todas. Su pensamiento fue heterodoxo, su saber inmenso, su obra variadísima. De lo que nos ha llegado de su poesía no siempre es fácil distinguir lo auténtico de lo apócrifo, y de lo que sabemos de su vida, la historia de la leyenda. Su más importante aportación algebraica, la resolución sistemática de las ecuaciones cúbicas cortando cónicas, se procurará poner al alcance de un lector moderno sin alterar las ideas de fondo.

Practice nonstandard measurement at the zoo! This exciting, Spanish-translated title encourages readers to practice measuring their favorite zoo animals, such as elephants, giraffes, pandas, and more. A gorilla weighs the same as three men! When a cheetah runs, its stride length is the length of three men! An elephant weighs the same as three pickup trucks! Vivid images, fun practice questions, early STEM themes, and helpful mathematical diagrams make nonstandard measurement entertaining and easy for children to understand.

This parent-teacher guide features the ancient and powerful art of storytelling to illustrate the yogic philosophy in finding both personal and world peace. Combining 26 stories drawn from varied faiths and cultures—African, Buddhist, Christian, Hindu, Jewish, Muslim, Native American, and Sufi—with the rewarding practice of yoga, this handbook provides a foundation for expanding children’s listening, literacy, and communication skills, as well as their physical fitness and self-confidence, resulting from the execution of the yoga moves themselves. A set of ready-made lesson plans urges...

This book gives students an in-depth look at how large telescopes work. The wonder and awe of space and the scientific instruments we use to study it both come shining through in this fascinating book. Full-color diagrams and illustrations will help students visualize how the technology of telescopes works. Students will learn about the creation of mirrors 8 meters wide and telescope teams that work together to create a telescope as powerful as if it had a mirror the size of the Earth!