Yo pido disculpas (I Say I'm Sorry)

In the last one hundred years, Earth’s average temperature has risen one full degree. That might not sound like much, but it affects Earth’s oceans, land, plants, and animals. Learn all about global warming, the carbon cycle, the greenhouse effect, and weather and climate with this Spanish science reader that brings the power of science and informational text to students at a level they can understand. This nonfiction book introduces students to new concepts, vocabulary terms, and STEM topics. With detailed images and fascinating sidebars, the leveled text supports students reading at...

"Four score and seven years ago..." begins Abraham Lincoln's beautiful speech commemorating the three-day battle that turned the tide of the Civil War. The South had been winning up to this point. So how did Union troops stop General Robert E. Lee's invasion of the North? With black-and-white illustrations throughout and sixteen pages of photos, this turning point in history is brought vividly to life.

La edición digital de este tomo VI de la colección Reflexiones para el siglo XXI pretende ser un ejercicio de memoria y una invitación a la conversación en momentos cruciales para la definición de los modos humanos de habitar la Tierra. Se trata de un tomo doble, contiene las reseñas de los eventos realizados durante 2019 y 2020. En 2019 la Cátedra Alfonso Reyes cumplió veinte años de su fundación y para celebrarlos organizamos una serie de eventos en los que la reflexión sobre el discurso fundacional de Carlos Fuentes “Un nuevo contrato social para el siglo XXI” fue el eje...

An elementary introduction to the workings of the human body, the skeleton, skin, circulation, and nervous system.