Medida del tiempo en las carreras (Timing Races) (Spanish Version)

As a land that’s constantly in flux, Earth sometimes reveals clues about the plants, animals, and other organisms that lived long ago. Fossils teach us much about what life was like millions of years ago, answering the questions of how Earth changed and maybe even why it changed. This essential Earth science topic is thoroughly explained through manageable text, fact boxes, informational charts and diagrams, and a glossary and index. Readers will become young Earth detectives by the time they’re through with this text!

Filled with tricks and treats, fun and food, Halloween is a day that children look forward to. At one time two separate festivals, the traditions of each gradually blended into the holiday we now celebrate on October 31.

Bridges are a big part of how people get from place to place. But how do they work and how are they built? In this engaging text, readers will explore these important engineering marvels that link places divided by water. Along the way they’ll learn how to build their own model bridge with a step-by-step guide accompanied by full-color photographs of each step. Accessible text illuminates the science behind every span we drive over—and sometimes under!

El objetivo de esta obra no es tanto la dogmática de la acción y de la comisión por omisión en sí mismas consideradas, sino básicamente el ajuste de ambas al principio de legalidad. Como ese ajuste es profundamente discutible, se ha creído necesaria una reflexión sobre los fundamentos y los fines de la dogmática penal. El resultado de esa reflexión es alarmante porque muestra un abuso del Derecho penal que no se limita a la comisión por omisión ni a la vulneración del principio de legalidad, sino que va mucho más allá. En efecto, hay muchas otras amenazas para la libertad que...