Experimentos sencillos con sólidos y líquidos

Vivid photographs and bilingual text explain each food group, revealing how each group is important for good health, how to make healthy choices, and fun things children can do to stay in shape.

California became a territory in the United States when the Treaty of Guadalupe Hidalgo was signed in 1848. That treaty ended the Mexican War. Several days before its signing, gold was discovered at Sutter’s Mill in what is now Sacramento. The non-Native population of the territory was less than one thousand in 1848, but the gold rush increased that number to one hundred thousand by the end of 1849. The gold rush not only made many people wealthy, it brought ecologic devastation while speeding up California’s statehood. This book richly explores this interesting history.

There is a contest at a school to design a new playground. The students use blocks to build their models. As they build, they use three-dimensional shapes. Some students build a train out of blocks for the younger students to play on. Can you guess which three-dimensional shape they use for the train's wheels? Read to find out which design wins.

Planear una "estética plural de la naturaleza" es darle a la obviedad del enunciado que se trata de explorar algo parecido a un impulso haciéndolo avanzar por el camino de la complejidad. Esto en primer lugar. Después, hay que pararse a pensar que la articulación de estos términos, arte y naturaleza, no sólo implica enlazar la actividad relativa al primero con una imagen o arsenal de imágenes en las que esta segunda se representaría; también es vincularla a un concepto que la significa. ¿Cuál? Lógicamente, la imitación, la mímesis. Aunque dadas las variaciones que ha sufrido...