Las ballenas

Sofía Vasilievna Korvin-Krukovski Kowalevsky se sintió atraída por las matemáticas desde muy joven, pero para poder estudiarlas tuvo que vencer la oposición de su familia, que consideraba que su estudio no era apropiado para una joven. Se vio obligada a aceptar un matrimonio de conveniencia para así poder salir de Rusia y tener acceso a una educación de nivel superior. Tampoco en Alemania las cosas estaban mucho mejor, pero Karl Weierstrass le dio clases privadamente y dirigió su tesis doctoral. Gracias a la intervención de Mittag-Leffler conseguiría una plaza de profesora en...

Wind Power: A waving flag, blowing leaves, a kite soaring through the skyall are moved by wind power. Wind is also our fast-growing source of energy. Find out how wind forms and the different ways we may use it in the future.

Hurricanes takes you inside one of nature's most powerful events! Warm water and wind can quickly spin into a deadly storm. Dramatic photos show the damage huge hurricanes leave behind, and safety tips help you protect yourself from danger. Spanish Edition

Everyone has times when they feel shy. Knowing how to recognize when we feel shy is an important tool in self-acceptance. Learn ways in which we can understand ourselves and our friends in this nonfiction Beginning-to-Read book about feeling shy. An early social and emotional learning book with Spanish-only text, including a word list. Perfect for an early introduction to Spanish.