Cómo funcionan las ruedas y los ejes

Ámbar y Azul, dos gemelas curiosas (aunque, a veces, demasiado graciosillas), emprenden un intrépido viaje en busca del misterioso ADN en compañía de Pío, un pollito sabio que conoce las respuestas a todas las preguntas. Los tres protagonistas se vuelven de tamaño microscópico y exploran una célula habitada por represores insufribles, ribosomas novatos, proteínas todoterreno y otras moléculas divertidas y estructuras celulares que ejercen un papel clave en los procesos que constituyen los fundamentos de la genética.

Practice time measurement by timing races! Racing is all about having the fastest time, so accurate time measurement is very important for athletes! Young readers will learn all about how athletes measure racing times and will practice their mathematical and STEM skills. The Spanish-translated text, vibrant images, fun practice problems, and helpful mathematical charts in this title make time measurement seem exciting and simple!

Though few may know his name, his achievement as the first European to discover San Diego Bay and many other areas on the California coast enshrines his name in the annals of American history. This exciting volume tells Cabrillo's story from an unknown soldier to the intrepid conquistador, crossbowman, landowner, shipbuilder, and explorer he became. As one of Hernan Cortes' soldiers during the conquest of Mexico and a founder of Guatemala, his actions loomed large in the future of both South America and North America. By both educating and entertaining, this biography illuminates a...

Fotografías que cuentan historias explora dos narraciones entremezclades: la historia de la fotografía en México y la historia de México en fotografías. Mediante preguntas, el libro aborda el riquísimo panorama y fotográfico al que contribuyeron autores mexicanos y extranjeros desde 1840.