Un día en el zoológico (Day at the Zoo) (Spanish Version)

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.

Who were the earliest Americans? When, how, and from where did they enter and spread across the continent? And what is their relationship to modern Native Americans? Anthropologists develop theories to answer these questions based on the evidence they discover. Their theories—and the discoveries that prove and disprove them—are highlighted in this fascinating volume, full of awe-inspiring facts and incredible breakthroughs. Readers will feel like anthropologists and archaeologists themselves as they read about bones and artifacts, and what they reveal about the ancient cultures that roamed...

For ages, the idea of machines that think and act on their own has gripped scientists, thinkers, and the general public. This book explores the history of artificial intelligence (A.I.), and how science fiction is quickly becoming science fact. It examines the technologies involved in A.I. and its inevitable effects on work, life, health, and many other aspects of human society. Rooted in history and science, this book provides an inside look at a topic that captivates engineers, scientists, and dreamers, but also raises important ethical issues and challenges how we see ourselves and our...

Jamás he escrito un libro con menos esperanza. Nadie me ha dicho nunca las cosas que me digo. No me importa que el otro No entienda mi palabra en la vida me quedo, por mi camino sigo. Pero sí estoy seguro de todo lo que siento. Me pasa a mí y me basta, yo lo sufro y lo vivo. Si hay alguien que comparta estas cosas que pienso, seremos dos. Iremos por el mismo camino.

Ojalá aquí encuentres las palabras exactas para aprender a quererte y a querer a los demás. Me da miedo que entres en estas hojas, pero sí lo haces sé que serás valiente. He vomitado todo lo que tengo dentro y que guardaba bajo llave, he recordado a las personas que están, las que se fueron y las que algún día llegarán, a quien me rompió el corazón y yo se lo rompí... He hecho honor a la vida, al amor propio, al querer y poder...por eso, espero que cuando leas la última letra sólo quieras volver leer y a empezar. Que nada es imposible, que quererse es de valientes