La canción helada

Bike riding is a lot of fun, but it can also be dangerous. Read about how people have made cycling safe over the years. Learn how bicycles have changed over time and how bike parts, equipment, and trails make cycling safer. Created in collaboration with the Smithsonian Institution, this Spanish book will ignite a curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that is perfect for makerspaces and that guides students step-by-step through the engineering design process. Make STEAM career connections with career advice from Smithsonian employees...

El abuelo no quiere renunciar a su gran ilusión: viajar al polo Norte tras la pista de los últimos osos polares. Y allá se va, con su perrita Roo, después de prometerle a su nieto que le escribirá todos los días para compartir con él sus aventuras en la nieve. Tema: Animales y medio ambiente Tratamiento: Aventuras Valores: Respeto a los animales y al medio ambienteIlustraciones en blanco y negro

Born in Warsaw, Poland, on November 7, 1867, Marie Curie was forbidden to attend the male-only University of Warsaw, so she enrolled at the Sorbonne in Paris to study physics and mathematics. There she met a professor named Pierre Curie, and the two soon married, forming one of the most famous scientific partnerships in history. Together they discovered two elements and won a Nobel Prize in 1903. (Later Marie won another Nobel award for chemistry in 1911.) She died in Savoy, France, on July 4, 1934, a victim of many years of exposure to toxic radiation.

27 recorridos, muchos de ellos clásicos y otros menos frecuentados, pero todos ellos imprescindibles para conocer uno de los espacios protegidos más singulares del planeta. Rutas en las que el autor sabe, además, cómo inculcar en el lector todo el interés que el itinerario merece, relatando detalladamente cada recorrido y los principales valores ecológicos que han motivado su inclusión en la guía.